Revert 171569 as it broke some browser_tests on win_aura.

content/browser/renderer_host/render_widget_host_impl.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_
 
 #include <deque>
 #include <list>
 #include <map>
@@ skipping 379 matching lines @@
   // base::TimeTicks::HighResNow. Using the non-high res timer will result in
   // incorrect synchronization across processes.
   virtual void UpdateVSyncParameters(base::TimeTicks timebase,
                                      base::TimeDelta interval);
 
   // Called by the view in response to AcceleratedSurfaceBuffersSwapped or
   // AcceleratedSurfacePostSubBuffer.
   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
   // platforms that support deferred GPU process descheduling. This does
   // nothing if the compositor thread is enabled.
   // TODO(jbates) Once the compositor thread is always on, this can be removed.
   void AcknowledgeSwapBuffersToRenderer();
 
 #if defined(USE_AURA)
   // 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
   // event.
   void CompositingSurfaceUpdated();
 
   void set_allow_privileged_mouse_lock(bool allow) {
     allow_privileged_mouse_lock_ = allow;
   }
 
@@ skipping 457 matching lines @@
 #if defined(OS_WIN)
   std::list<HWND> dummy_windows_for_activation_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_