Revert 171569 as it broke some browser_tests on win_aura.

content/browser/renderer_host/render_widget_host_impl.h

Index: content/browser/renderer_host/render_widget_host_impl.h
===================================================================
--- content/browser/renderer_host/render_widget_host_impl.h	(revision 171661)
+++ content/browser/renderer_host/render_widget_host_impl.h	(working copy)
@@ -397,7 +397,7 @@
   static void AcknowledgeBufferPresent(
       int32 route_id,
       int gpu_host_id,
-      uint64 surface_handle,
+      bool presented,
       uint32 sync_point);
 
   // Called by the view in response to AcceleratedSurfaceBuffersSwapped for
@@ -410,6 +410,15 @@
   // Called by the view when the parent changes. If a parent isn't available,
   // NULL is used.
   void ParentChanged(gfx::NativeViewId new_parent);
+
+  // Called by the view in response to visibility changes:
+  // 1. After the front surface is guarenteed to no longer be in use by the ui
+  //    (protected false),
+  // 2. When the ui expects to have a valid front surface (protected true).
+  static void SendFrontSurfaceIsProtected(bool is_protected,
+                                          uint32 protection_state_id,
+                                          int32 route_id,
+                                          int gpu_host_id);
 #endif
 
   // Signals that the compositing surface was updated, e.g. after a lost context