Migrate impeller/**.h to header guards.

impeller/aiks/aiks_context.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_AIKS_CONTEXT_H_
+#define FLUTTER_IMPELLER_AIKS_AIKS_CONTEXT_H_
 
 #include <memory>
 
@@ -51,3 +52,5 @@ class AiksContext {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_AIKS_CONTEXT_H_

impeller/aiks/aiks_playground.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_AIKS_PLAYGROUND_H_
+#define FLUTTER_IMPELLER_AIKS_AIKS_PLAYGROUND_H_
 
 #include "flutter/fml/macros.h"
 #include "impeller/aiks/aiks_context.h"
@@ -41,3 +42,5 @@ class AiksPlayground : public PlaygroundTest {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_AIKS_PLAYGROUND_H_

impeller/aiks/canvas.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_CANVAS_H_
+#define FLUTTER_IMPELLER_AIKS_CANVAS_H_
 
 #include <deque>
 #include <functional>
@@ -198,3 +199,5 @@ class Canvas {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_CANVAS_H_

impeller/aiks/canvas_recorder.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_CANVAS_RECORDER_H_
+#define FLUTTER_IMPELLER_AIKS_CANVAS_RECORDER_H_
 
 #include <cstdint>
 
@@ -303,3 +304,5 @@ class CanvasRecorder {
 #endif
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_CANVAS_RECORDER_H_

impeller/aiks/canvas_type.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_CANVAS_TYPE_H_
+#define FLUTTER_IMPELLER_AIKS_CANVAS_TYPE_H_
 
 #include "impeller/aiks/canvas.h"
 #include "impeller/aiks/canvas_recorder.h"
@@ -20,3 +21,5 @@ using CanvasType = Canvas;
 #endif
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_CANVAS_TYPE_H_

impeller/aiks/color_filter.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_COLOR_FILTER_H_
+#define FLUTTER_IMPELLER_AIKS_COLOR_FILTER_H_
 
 #include "impeller/entity/contents/filters/color_filter_contents.h"
 #include "impeller/geometry/color.h"
@@ -176,3 +177,5 @@ class ComposedColorFilter final : public ColorFilter {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_COLOR_FILTER_H_

impeller/aiks/color_source.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_COLOR_SOURCE_H_
+#define FLUTTER_IMPELLER_AIKS_COLOR_SOURCE_H_
 
 #include <functional>
 #include <memory>
@@ -103,3 +104,5 @@ class ColorSource {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_COLOR_SOURCE_H_

impeller/aiks/image.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_IMAGE_H_
+#define FLUTTER_IMPELLER_AIKS_IMAGE_H_
 
 #include <memory>
 
@@ -30,3 +31,5 @@ class Image {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_IMAGE_H_

impeller/aiks/image_filter.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_IMAGE_FILTER_H_
+#define FLUTTER_IMPELLER_AIKS_IMAGE_FILTER_H_
 
 #include "impeller/aiks/color_filter.h"
 #include "impeller/core/sampler_descriptor.h"
@@ -271,3 +272,5 @@ class LocalMatrixImageFilter : public ImageFilter {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_IMAGE_FILTER_H_

impeller/aiks/paint.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_PAINT_H_
+#define FLUTTER_IMPELLER_AIKS_PAINT_H_
 
 #include <memory>
 
@@ -106,3 +107,5 @@ struct Paint {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_PAINT_H_

impeller/aiks/paint_pass_delegate.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_PAINT_PASS_DELEGATE_H_
+#define FLUTTER_IMPELLER_AIKS_PAINT_PASS_DELEGATE_H_
 
 #include <optional>
 
@@ -81,3 +82,5 @@ class OpacityPeepholePassDelegate final : public EntityPassDelegate {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_PAINT_PASS_DELEGATE_H_

impeller/aiks/picture.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_PICTURE_H_
+#define FLUTTER_IMPELLER_AIKS_PICTURE_H_
 
 #include <deque>
 #include <memory>
@@ -31,3 +32,5 @@ struct Picture {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_PICTURE_H_

impeller/aiks/picture_recorder.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_PICTURE_RECORDER_H_
+#define FLUTTER_IMPELLER_AIKS_PICTURE_RECORDER_H_
 
 #include "flutter/fml/macros.h"
 #include "impeller/aiks/canvas.h"
@@ -25,3 +26,5 @@ class PictureRecorder {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_PICTURE_RECORDER_H_

impeller/aiks/testing/context_mock.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_TESTING_CONTEXT_MOCK_H_
+#define FLUTTER_IMPELLER_AIKS_TESTING_CONTEXT_MOCK_H_
 
 #include <string>
 #include <utility>
@@ -115,3 +116,5 @@ class ContextMock : public Context {
 
 }  // namespace testing
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_TESTING_CONTEXT_MOCK_H_

impeller/aiks/testing/context_spy.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_TESTING_CONTEXT_SPY_H_
+#define FLUTTER_IMPELLER_AIKS_TESTING_CONTEXT_SPY_H_
 
 #include <memory>
 #include "impeller/aiks/testing/context_mock.h"
@@ -28,3 +29,5 @@ class ContextSpy : public std::enable_shared_from_this<ContextSpy> {
 }  // namespace testing
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_TESTING_CONTEXT_SPY_H_

impeller/aiks/trace_serializer.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_TRACE_SERIALIZER_H_
+#define FLUTTER_IMPELLER_AIKS_TRACE_SERIALIZER_H_
 
 #include <iostream>
 #include "impeller/aiks/canvas_recorder.h"
@@ -62,3 +63,5 @@ class TraceSerializer {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_TRACE_SERIALIZER_H_

impeller/archivist/archivable.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ARCHIVIST_ARCHIVABLE_H_
+#define FLUTTER_IMPELLER_ARCHIVIST_ARCHIVABLE_H_
 
 #include <cstdint>
 #include <optional>
@@ -36,3 +37,5 @@ class Archivable {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ARCHIVIST_ARCHIVABLE_H_

impeller/archivist/archive.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_H_
+#define FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_H_
 
 #include <functional>
 #include <memory>
@@ -72,3 +73,5 @@ class Archive {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_H_

impeller/archivist/archive_class_registration.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_CLASS_REGISTRATION_H_
+#define FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_CLASS_REGISTRATION_H_
 
 #include <map>
 #include <optional>
@@ -49,3 +50,5 @@ class ArchiveClassRegistration {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_CLASS_REGISTRATION_H_

impeller/archivist/archive_database.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_DATABASE_H_
+#define FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_DATABASE_H_
 
 #include <map>
 #include <memory>
@@ -53,3 +54,5 @@ class ArchiveDatabase {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_DATABASE_H_

impeller/archivist/archive_location.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_LOCATION_H_
+#define FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_LOCATION_H_
 
 #include <optional>
 #include <type_traits>
@@ -171,3 +172,5 @@ class ArchiveLocation {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_LOCATION_H_

impeller/archivist/archive_statement.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_STATEMENT_H_
+#define FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_STATEMENT_H_
 
 #include <memory>
 #include <type_traits>
@@ -95,3 +96,5 @@ class ArchiveStatement {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_STATEMENT_H_

impeller/archivist/archive_transaction.h

@@ -1,7 +1,8 @@
 // Copyright 2013 The Flutter Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
-#pragma once
+#ifndef FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_TRANSACTION_H_
+#define FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_TRANSACTION_H_
 
 #include <cstdint>
 
@@ -47,3 +48,5 @@ class ArchiveTransaction {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_TRANSACTION_H_

impeller/archivist/archive_vector.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_VECTOR_H_
+#define FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_VECTOR_H_
 
 #include "impeller/archivist/archive.h"
 
@@ -35,3 +36,5 @@ class ArchiveVector : public Archivable {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ARCHIVIST_ARCHIVE_VECTOR_H_

impeller/archivist/archivist_fixture.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_ARCHIVIST_ARCHIVIST_FIXTURE_H_
+#define FLUTTER_IMPELLER_ARCHIVIST_ARCHIVIST_FIXTURE_H_
 
 #include "flutter/fml/macros.h"
 #include "flutter/testing/testing.h"
@@ -36,3 +37,5 @@ class ArchivistFixture : public ::testing::Test {
 
 }  // namespace testing
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_ARCHIVIST_ARCHIVIST_FIXTURE_H_