Creating PNG images from web content to be used by OverviewMode navigation

athena/content/web_activity.h

Index: athena/content/web_activity.h
diff --git a/athena/content/web_activity.h b/athena/content/web_activity.h
index 4c23e81aa346ac877cc27fd4972c1628c2efa988..053e0881b259ff31f8f0fa9e0e9938dc6833131c 100644
--- a/athena/content/web_activity.h
+++ b/athena/content/web_activity.h
@@ -13,6 +13,7 @@
 #include "base/memory/weak_ptr.h"
 #include "base/strings/string16.h"
 #include "content/public/browser/web_contents_observer.h"
+#include "ui/gfx/image/image.h"
 #include "ui/gfx/image/image_skia.h"
 
 class SkBitmap;
@@ -64,7 +65,7 @@ class WebActivity : public Activity,
   virtual bool UsesFrame() const OVERRIDE;
   virtual views::View* GetContentsView() OVERRIDE;
   virtual views::Widget* CreateWidget() OVERRIDE;
-  virtual gfx::ImageSkia GetOverviewModeImage() OVERRIDE;
+  virtual scoped_ptr<gfx::Image> GetOverviewModeImage() OVERRIDE;
   virtual void PrepareContentsForOverview() OVERRIDE;
   virtual void ResetContentsView() OVERRIDE;