Revert 189969 "Add RenderWidgetHost::GetSnapshotFromRenderer met..."

content/public/browser/render_widget_host.h

Index: content/public/browser/render_widget_host.h
===================================================================
--- content/public/browser/render_widget_host.h	(revision 190011)
+++ content/public/browser/render_widget_host.h	(working copy)
@@ -284,16 +284,6 @@
   // Get the screen info corresponding to this render widget.
   virtual void GetWebScreenInfo(WebKit::WebScreenInfo* result) = 0;
 
-  // Grabs snapshot from renderer side and returns the bitmap to a callback.
-  // If |src_rect| is empty, the whole contents is copied. This is an expensive
-  // operation due to the IPC, but it can be used as a fallback method when
-  // CopyFromBackingStore fails due to the backing store not being available or,
-  // in composited mode, when the accelerated surface is not available to the
-  // browser side.
-  virtual void GetSnapshotFromRenderer(
-      const gfx::Rect& src_subrect,
-      const base::Callback<void(bool, const SkBitmap&)>& callback) = 0;
-
  protected:
   friend class RenderWidgetHostImpl;