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 6e124b321bd57e00648a24a0f89601475a47487a..931983d15c59dba1af2e2712209f75bb139187f4 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -1139,17 +1139,6 @@ bool RenderThreadImpl::CreateViewCommandBuffer(
   return succeeded;
 }
 
-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,