{Browser}GpuMemoryBufferManager: add supported native attrib queries

gpu/command_buffer/client/gpu_memory_buffer_manager.h

Index: gpu/command_buffer/client/gpu_memory_buffer_manager.h
diff --git a/gpu/command_buffer/client/gpu_memory_buffer_manager.h b/gpu/command_buffer/client/gpu_memory_buffer_manager.h
index b75780bbc14921cd33d7646272734e456ff1861f..8b369c40e77100a3ed340c06088df592e361df2c 100644
--- a/gpu/command_buffer/client/gpu_memory_buffer_manager.h
+++ b/gpu/command_buffer/client/gpu_memory_buffer_manager.h
@@ -8,6 +8,7 @@
 #include <memory>
 
 #include "gpu/gpu_export.h"
+#include "gpu/ipc/common/gpu_memory_buffer_support.h"
 #include "gpu/ipc/common/surface_handle.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/gfx/gpu_memory_buffer.h"
@@ -31,6 +32,9 @@ class GPU_EXPORT GpuMemoryBufferManager {
   // Associates destruction sync point with |buffer|.
   virtual void SetDestructionSyncToken(gfx::GpuMemoryBuffer* buffer,
                                        const gpu::SyncToken& sync_token) = 0;
+
+  // Returns the supported GpuMemoryBufferAttrib pairs.
+  virtual gfx::GpuMemoryBufferAttribVector GetGpuMemoryBufferAttribs();
 };
 
 }  // namespace gpu