Accept >=1 calls for implementation detail mocks

Author: loic-sharma

shell/platform/windows/flutter_window_unittests.cc

@@ -313,7 +313,7 @@ TEST(FlutterWindowTest, AlertNode) {
   std::unique_ptr<MockFlutterWindow> win32window =
       std::make_unique<MockFlutterWindow>();
   EXPECT_CALL(*win32window.get(), GetAxFragmentRootDelegate())
-      .WillOnce(Return(nullptr));
+      .WillRepeatedly(Return(nullptr));
   EXPECT_CALL(*win32window.get(), OnWindowStateEvent).Times(AnyNumber());
   MockFlutterWindowsView view(std::move(win32window));
   std::wstring message = L"Test alert";

shell/platform/windows/flutter_windows_engine_unittests.cc

@@ -641,7 +641,7 @@ TEST_F(FlutterWindowsEngineTest, AlertPlatformMessage) {
   ui::AXPlatformNodeDelegateBase parent_delegate;
   AlertPlatformNodeDelegate delegate(parent_delegate);
   EXPECT_CALL(*window_binding_handler, GetAlertDelegate)
-      .WillOnce(Return(&delegate));
+      .WillRepeatedly(Return(&delegate));
   MockFlutterWindowsView view(std::move(window_binding_handler));
   view.SetEngine(engine.get());
 
@@ -717,7 +717,7 @@ TEST_F(FlutterWindowsEngineTest, TestExit) {
                             std::optional<WPARAM> wparam,
                             std::optional<LPARAM> lparam,
                             UINT exit_code) { finished = exit_code == 0; });
-  EXPECT_CALL(*handler, IsLastWindowOfProcess).WillOnce(Return(true));
+  EXPECT_CALL(*handler, IsLastWindowOfProcess).WillRepeatedly(Return(true));
   modifier.SetLifecycleManager(std::move(handler));
 
   engine->lifecycle_manager()->BeginProcessingExit();