exo: Directly create GpuMemoryBufferImpl when a handle is available.

services/ui/public/cpp/gpu/client_gpu_memory_buffer_manager.h

Index: services/ui/public/cpp/gpu/client_gpu_memory_buffer_manager.h
diff --git a/services/ui/public/cpp/gpu/client_gpu_memory_buffer_manager.h b/services/ui/public/cpp/gpu/client_gpu_memory_buffer_manager.h
index 88f4dcc77d65fe95fecdf92cc2dde7d0809c767a..26d78ea5781ceb1ffc894cfd8784a668392ef2df 100644
--- a/services/ui/public/cpp/gpu/client_gpu_memory_buffer_manager.h
+++ b/services/ui/public/cpp/gpu/client_gpu_memory_buffer_manager.h
@@ -43,10 +43,6 @@ class ClientGpuMemoryBufferManager : public gpu::GpuMemoryBufferManager {
       gfx::BufferFormat format,
       gfx::BufferUsage usage,
       gpu::SurfaceHandle surface_handle) override;
-  std::unique_ptr<gfx::GpuMemoryBuffer> CreateGpuMemoryBufferFromHandle(
-      const gfx::GpuMemoryBufferHandle& handle,
-      const gfx::Size& size,
-      gfx::BufferFormat format) override;
   void SetDestructionSyncToken(gfx::GpuMemoryBuffer* buffer,
                                const gpu::SyncToken& sync_token) override;
   int counter_ = 0;