Add GpuMemoryBuffer CreateFromClientId interface

content/browser/gpu/browser_gpu_memory_buffer_manager.h

Index: content/browser/gpu/browser_gpu_memory_buffer_manager.h
diff --git a/content/browser/gpu/browser_gpu_memory_buffer_manager.h b/content/browser/gpu/browser_gpu_memory_buffer_manager.h
index f3f4fa33890b833b07a2d20966ba3988cc8e0510..e9062f8c05c98caadaef4287f36c2f6b30719088 100644
--- a/content/browser/gpu/browser_gpu_memory_buffer_manager.h
+++ b/content/browser/gpu/browser_gpu_memory_buffer_manager.h
@@ -73,6 +73,9 @@ class CONTENT_EXPORT BrowserGpuMemoryBufferManager
       const gfx::GpuMemoryBufferHandle& handle,
       const gfx::Size& size,
       gfx::BufferFormat format) override;
+  std::unique_ptr<gfx::GpuMemoryBuffer> CreateGpuMemoryBufferFromChildId(
+      int child_client_id,
+      const gfx::GpuMemoryBufferId& gpu_memory_buffer_id) override;
   gfx::GpuMemoryBuffer* GpuMemoryBufferFromClientBuffer(
       ClientBuffer buffer) override;
   void SetDestructionSyncToken(gfx::GpuMemoryBuffer* buffer,
@@ -127,6 +130,7 @@ class CONTENT_EXPORT BrowserGpuMemoryBufferManager
 
   struct CreateGpuMemoryBufferRequest;
   struct CreateGpuMemoryBufferFromHandleRequest;
+  struct CreateGpuMemoryBufferFromChildIdRequest;
 
   using CreateDelegate = base::Callback<void(GpuProcessHost* host,
                                              gfx::GpuMemoryBufferId id,
@@ -146,6 +150,8 @@ class CONTENT_EXPORT BrowserGpuMemoryBufferManager
   void HandleCreateGpuMemoryBufferOnIO(CreateGpuMemoryBufferRequest* request);
   void HandleCreateGpuMemoryBufferFromHandleOnIO(
       CreateGpuMemoryBufferFromHandleRequest* request);
+  void HandleCreateGpuMemoryBufferFromChildIdOnIO(
+      CreateGpuMemoryBufferFromChildIdRequest* request);
   void HandleGpuMemoryBufferCreatedOnIO(
       CreateGpuMemoryBufferRequest* request,
       const gfx::GpuMemoryBufferHandle& handle);