Delay the response to ChildProcessHostMsg_SyncAllocateGpuMemoryBuffer via a callback to allow for b…

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 0f355d78a751d0b02a0072b5dc8e89f095f0e52d..f020316ae091bcdb2d2879af74a7c3ad4051bfc8 100644
--- a/content/browser/renderer_host/render_message_filter.h
+++ b/content/browser/renderer_host/render_message_filter.h
@@ -278,7 +278,9 @@ class RenderMessageFilter : public BrowserMessageFilter {
                                  uint32 height,
                                  uint32 internalformat,
                                  uint32 usage,
-                                 gfx::GpuMemoryBufferHandle* handle);
+                                 IPC::Message* reply);
+  void GpuMemoryBufferAllocated(IPC::Message* reply,
+                                const gfx::GpuMemoryBufferHandle& handle);
 
   // Cached resource request dispatcher host and plugin service, guaranteed to
   // be non-null if Init succeeds. We do not own the objects, they are managed