Fix favicon disappearing on pinned tabs

chrome/browser/ui/views/tabs/tab.h

 // Copyright (c) 2012 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.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_TABS_TAB_H_
 #define CHROME_BROWSER_UI_VIEWS_TABS_TAB_H_
 
 #include <list>
 #include <string>
 
@@ skipping 64 matching lines @@
   // Sets the container all animations run from.
   void SetAnimationContainer(gfx::AnimationContainer* container);
 
   // Returns true if this tab is the active tab.
   bool IsActive() const;
 
   // Notifies the MediaIndicatorButton that the active state of this tab has
   // changed.
   void ActiveStateChanged();
 
+  // Called when the media indicator has changed states.
+  void MediaStateChanged();
+
   // Returns true if the tab is selected.
   bool IsSelected() const;
 
   // Sets the data this tabs displays. Invokes DataChanged. Should only be
   // called after Tab is added to widget hierarchy.
   void SetData(const TabRendererData& data);
   const TabRendererData& data() const { return data_; }
 
   // Sets the network state.
   void UpdateLoadingAnimation(TabRendererData::NetworkState state);
@@ skipping 71 matching lines @@
   // Returns the inverse of the slope of the diagonal portion of the tab outer
   // border.  (This is a positive value, so it's specifically for the slope of
   // the leading edge.)
   //
   // This returns the inverse (dx/dy instead of dy/dx) because we use exact
   // values for the vertical distances between points and then compute the
   // horizontal deltas from those.
   static float GetInverseDiagonalSlope();
 
  private:
+  friend class MediaIndicatorButtonTest;
   friend class TabTest;
   friend class TabStripTest;
   FRIEND_TEST_ALL_PREFIXES(TabStripTest, TabHitTestMaskWhenStacked);
   FRIEND_TEST_ALL_PREFIXES(TabStripTest, TabCloseButtonVisibilityWhenStacked);
 
   // The animation object used to swap the favicon with the sad tab icon.
   class FaviconCrashAnimation;
 
   class TabCloseButton;
   class ThrobberView;
@@ skipping 210 matching lines @@
   SkColor button_color_;
 
   // As the majority of the tabs are inactive, and painting tabs is slowish,
   // we cache a handful of the inactive tab backgrounds here.
   static ImageCache* image_cache_;
 
   DISALLOW_COPY_AND_ASSIGN(Tab);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TABS_TAB_H_