Change panels to use gfx::Image instead of SkBitmap for favicon.

chrome/browser/ui/panels/panel_host.h

Index: chrome/browser/ui/panels/panel_host.h
diff --git a/chrome/browser/ui/panels/panel_host.h b/chrome/browser/ui/panels/panel_host.h
index 406f66dacd22c8eb0de914f509eef0f03fb89504..8b23817ac2c138e5d69b33be147c01c2d27ee537 100644
--- a/chrome/browser/ui/panels/panel_host.h
+++ b/chrome/browser/ui/panels/panel_host.h
@@ -26,6 +26,7 @@ class WindowController;
 }
 
 namespace gfx {
+class Image;
 class Rect;
 }
 
@@ -43,7 +44,7 @@ class PanelHost : public content::WebContentsDelegate,
   void DestroyWebContents();
 
   // Returns the icon for the current page.
-  SkBitmap GetPageIcon() const;
+  gfx::Image GetPageIcon() const;
 
   // content::WebContentsDelegate overrides.
   virtual void NavigationStateChanged(const content::WebContents* source,