gpu: Add GpuFence framework.

content/browser/renderer_host/render_message_filter.h

Index: content/browser/renderer_host/render_message_filter.h
diff --git a/content/browser/renderer_host/render_message_filter.h b/content/browser/renderer_host/render_message_filter.h
index 1aa79618ab91d17918a38927b6edf68e2aad993e..b03a80f5967a8b6dc4a31b91e19da50d76d131f3 100644
--- a/content/browser/renderer_host/render_message_filter.h
+++ b/content/browser/renderer_host/render_message_filter.h
@@ -30,6 +30,7 @@
 #include "ipc/message_filter.h"
 #include "third_party/WebKit/public/web/WebPopupType.h"
 #include "ui/gfx/geometry/rect.h"
+#include "ui/gfx/gpu_fence.h"
 #include "ui/gfx/gpu_memory_buffer.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/surface/transport_dib.h"
@@ -227,6 +228,8 @@ class CONTENT_EXPORT RenderMessageFilter
                                 const gfx::GpuMemoryBufferHandle& handle);
   void OnDeletedGpuMemoryBuffer(gfx::GpuMemoryBufferId id,
                                 const gpu::SyncToken& sync_token);
+  void OnCreateGpuFence(IPC::Message* reply);
+  void GpuFenceCreated(IPC::Message* reply, const gfx::GpuFenceHandle& handle);
 
   // Cached resource request dispatcher host, guaranteed to be non-null. We do
   // not own it; it is managed by the BrowserProcess, which has a wider scope