gpu: Remove Create/DeleteImage IPC by adding an X11_PIXMAP_BUFFER GpuMemoryBuffer type.

content/renderer/render_thread_impl.cc

Index: content/renderer/render_thread_impl.cc
diff --git a/content/renderer/render_thread_impl.cc b/content/renderer/render_thread_impl.cc
index 952c7d75781be7db87d5a0843423d2b1136e0bf2..56361e6f136601ff67f90d9971d1b8226c934215 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -1237,17 +1237,6 @@ CreateCommandBufferResult RenderThreadImpl::CreateViewCommandBuffer(
   return result;
 }
 
-void RenderThreadImpl::CreateImage(
-    gfx::PluginWindowHandle window,
-    int32 image_id,
-    const CreateImageCallback& callback) {
-  NOTREACHED();
-}
-
-void RenderThreadImpl::DeleteImage(int32 image_id, int32 sync_point) {
-  NOTREACHED();
-}
-
 scoped_ptr<gfx::GpuMemoryBuffer> RenderThreadImpl::AllocateGpuMemoryBuffer(
     size_t width,
     size_t height,