Start caching the theme color in web_contents

content/public/android/java/src/org/chromium/content_public/browser/WebContents.java

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.content_public.browser;
 
 import org.chromium.base.VisibleForTesting;
 
 /**
  * The WebContents Java wrapper to allow communicating with the native WebContents object.
@@ skipping 213 matching lines @@
 
     /**
      * Returns whether the initial empty page has been accessed by a script from another
      * page. Always false after the first commit.
      *
      * @return Whether the initial empty page has been accessed by a script.
      */
     public boolean hasAccessedInitialDocument();
 
     /**
+     * This returns the theme color as set by the theme-color meta tag after getting rid of the
+     * alpha.
+     * @param The default color to be returned if the cached color is not valid.
+     * @return The theme color for the content as set by the theme-color meta tag.
+     */
+    public int getThemeColor(int defaultColor);
+
+    /**
      * Add an observer to the WebContents
      *
      * @param observer The observer to add.
      */
     void addObserver(WebContentsObserver observer);
 
     /**
      * Remove an observer from the WebContents
      *
      * @param observer The observer to remove.
      */
     void removeObserver(WebContentsObserver observer);
 }