gpu: Add support for GLX_EXT_texture_from_pixmap extension.

content/common/gpu/gpu_channel_manager.h

Index: content/common/gpu/gpu_channel_manager.h
diff --git a/content/common/gpu/gpu_channel_manager.h b/content/common/gpu/gpu_channel_manager.h
index b256a56d8d0123b600f2f1140fefddf1ade58975..912d98b5dae41370df98cfb42de8de109129d5fd 100644
--- a/content/common/gpu/gpu_channel_manager.h
+++ b/content/common/gpu/gpu_channel_manager.h
@@ -106,6 +106,16 @@ class GpuChannelManager : public IPC::Listener,
       int32 render_view_id,
       int32 client_id,
       const GPUCreateCommandBufferConfig& init_params);
+  void OnCreateImageSyncPointRetired(
+      gfx::PluginWindowHandle window,
+      int32 client_id,
+      int32 image_id);
+  void OnCreateImage(
+      gfx::PluginWindowHandle window,
+      int32 client_id,
+      int32 image_id);
+  void OnDeleteImageSyncPointRetired(int32 client_id, int32 image_id);
+  void OnDeleteImage(int32 client_id, int32 image_id, int32 sync_point);
 
   void OnLoseAllContexts();
 
@@ -127,6 +137,7 @@ class GpuChannelManager : public IPC::Listener,
   scoped_refptr<SyncPointManager> sync_point_manager_;
   scoped_ptr<gpu::gles2::ProgramCache> program_cache_;
   scoped_refptr<gfx::GLSurface> default_offscreen_surface_;
+  int32 image_sync_point_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuChannelManager);
 };