Revert of gpu: guarantee to match pending GBM buffer request to actual GBM handle

content/browser/gpu/gpu_process_host.h

Index: content/browser/gpu/gpu_process_host.h
diff --git a/content/browser/gpu/gpu_process_host.h b/content/browser/gpu/gpu_process_host.h
index 77247553ac29b780a489039d3d7b8407965d6bd6..bd98b70c0212e387873314d736f00e191ea89f33 100644
--- a/content/browser/gpu/gpu_process_host.h
+++ b/content/browser/gpu/gpu_process_host.h
@@ -231,8 +231,7 @@
   std::queue<EstablishChannelCallback> channel_requests_;
 
   // The pending create gpu memory buffer requests we need to reply to.
-  base::flat_map<gfx::GpuMemoryBufferId, CreateGpuMemoryBufferCallback>
-      create_gpu_memory_buffer_requests_;
+  std::queue<CreateGpuMemoryBufferCallback> create_gpu_memory_buffer_requests_;
 
   // A callback to signal the completion of a SendDestroyingVideoSurface call.
   base::Closure send_destroying_video_surface_done_cb_;