From d08b6945180f0c2708764ae85beacc024ddb192d Mon Sep 17 00:00:00 2001
From: Daniel Freedman <dfreedm@google.com>
Date: Mon, 26 Sep 2016 12:05:57 -0700
Subject: [PATCH] Fix IE style cache performance

Continue workaround from 80be0df for @media staleness, but only refresh
the stylesheet if it came from the cache and has @media queries.

Fixes #3965
---
 src/lib/style-properties.html | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/lib/style-properties.html b/src/lib/style-properties.html
index 4544ede18a..39006eeb08 100644
--- a/src/lib/style-properties.html
+++ b/src/lib/style-properties.html
@@ -494,9 +494,13 @@
             }
           // shady and cache hit but not in document
           } else if (!style.parentNode) {
+            if (IS_IE && cssText.indexOf('@media') > -1) {
+              // @media rules may be stale in IE 10 and 11
+              // refresh the text content of the style to revalidate them.
+              style.textContent = cssText;
+            }
             styleUtil.applyStyle(style, null, element._scopeStyle);
           }
-
         }
         // ensure this style is our custom style and increment its use count.
         if (style) {
@@ -507,10 +511,6 @@
           }
           element._customStyle = style;
         }
-        // @media rules may be stale in IE 10 and 11
-        if (IS_IE) {
-          style.textContent = style.textContent;
-        }
         return style;
       },