views: Extract TabIconViewModel into its own header file.

chrome/browser/ui/views/ash/browser_non_client_frame_view_ash.h

Index: chrome/browser/ui/views/ash/browser_non_client_frame_view_ash.h
diff --git a/chrome/browser/ui/views/ash/browser_non_client_frame_view_ash.h b/chrome/browser/ui/views/ash/browser_non_client_frame_view_ash.h
index 4a742f72ec995702d512d902522a04eeda8e504a..c9d62779b8205bf70973f4d06561fb93c5df470f 100644
--- a/chrome/browser/ui/views/ash/browser_non_client_frame_view_ash.h
+++ b/chrome/browser/ui/views/ash/browser_non_client_frame_view_ash.h
@@ -10,9 +10,11 @@
 #include "chrome/browser/ui/search/search_types.h"
 #include "chrome/browser/ui/search/toolbar_search_animator_observer.h"
 #include "chrome/browser/ui/views/frame/browser_non_client_frame_view.h"
-#include "chrome/browser/ui/views/tab_icon_view.h"
+#include "chrome/browser/ui/views/tab_icon_view_model.h"
 #include "ui/views/controls/button/button.h"  // ButtonListener
 
+class TabIconView;
+
 namespace ash {
 class FramePainter;
 }
@@ -23,7 +25,7 @@ class ImageButton;
 class BrowserNonClientFrameViewAsh
     : public BrowserNonClientFrameView,
       public views::ButtonListener,
-      public TabIconView::TabIconViewModel,
+      public chrome::TabIconViewModel,
       public chrome::search::ToolbarSearchAnimatorObserver {
  public:
   static const char kViewClassName[];
@@ -61,7 +63,7 @@ class BrowserNonClientFrameViewAsh
   virtual void ButtonPressed(views::Button* sender,
                              const views::Event& event) OVERRIDE;
 
-  // Overridden from TabIconView::TabIconViewModel:
+  // Overridden from chrome::TabIconViewModel:
   virtual bool ShouldTabIconViewAnimate() const OVERRIDE;
   virtual gfx::ImageSkia GetFaviconForTabIconView() OVERRIDE;