GpuService: introduce GetGpuMemoryBufferAttribs as a mojo interface

services/ui/gpu/gpu_service.h

Index: services/ui/gpu/gpu_service.h
diff --git a/services/ui/gpu/gpu_service.h b/services/ui/gpu/gpu_service.h
index 990c488b595ae075ad7abaefa745666b2a5dc732..9ac063941e87db08daba5a9088627c63e4d0db63 100644
--- a/services/ui/gpu/gpu_service.h
+++ b/services/ui/gpu/gpu_service.h
@@ -139,6 +139,8 @@ class GpuService : public gpu::GpuChannelManagerDelegate,
   void DestroyGpuMemoryBuffer(gfx::GpuMemoryBufferId id,
                               int client_id,
                               const gpu::SyncToken& sync_token) override;
+  void GetGpuMemoryBufferAttribs(
+      const GetGpuMemoryBufferAttribsCallback& callback) override;
   void GetVideoMemoryUsageStats(
       const GetVideoMemoryUsageStatsCallback& callback) override;
   void RequestCompleteGpuInfo(