Navigation transitions: Parse out transition-entering-stylesheet link headers.

content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java

Index: content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java b/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
index 45f6f8719ee76dd9984c0f4e0de72f83d035b204..eb88cacb4660fcfd8329fec995e3d0d58ba34d7b 100644
--- a/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
+++ b/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
@@ -233,6 +233,12 @@ public class ContentViewCore
          * if it's supported.
          */
         public boolean willHandleDeferAfterResponseStarted();
+
+        /**
+         * Called when the navigation is deferred immediately after the response
+         * started.
+         */
+        public void addStylesheetToTransition(String stylesheet);
     }
 
     private final Context mContext;
@@ -3124,6 +3130,13 @@ public class ContentViewCore
         mNavigationTransitionDelegate = delegate;
     }
 
+    @CalledByNative
+    private void addStylesheetToTransition(String stylesheet) {
+        if (mNavigationTransitionDelegate != null ) {
+            mNavigationTransitionDelegate.addStylesheetToTransition(stylesheet);
+        }
+    }
+
     /**
      * Offer a long press gesture to the embedding View, primarily for WebView compatibility.
      *