gpu: Introduce separate mojo api for failed initialization.

services/ui/ws/gpu_host.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef SERVICES_UI_WS_GPU_HOST_H_
 #define SERVICES_UI_WS_GPU_HOST_H_
 
 #include "base/single_thread_task_runner.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/thread.h"
@@ skipping 37 matching lines @@
   void CreateDisplayCompositor(cc::mojom::DisplayCompositorRequest request,
                                cc::mojom::DisplayCompositorClientPtr client);
 
  private:
   friend class test::GpuHostTest;
 
   GpuClient* AddInternal(mojom::GpuRequest request);
   void OnBadMessageFromGpu();
 
   // mojom::GpuHost:
-  void DidInitialize(const gpu::GPUInfo& gpu_info) override;
+  void DidInitialize(const gpu::GPUInfo& gpu_info,
+                     const gpu::GpuFeatureInfo& gpu_feature_info) override;
+  void DidFailInitialize() override;
   void DidCreateOffscreenContext(const GURL& url) override;
   void DidDestroyOffscreenContext(const GURL& url) override;
   void DidDestroyChannel(int32_t client_id) override;
   void DidLoseContext(bool offscreen,
                       gpu::error::ContextLostReason reason,
                       const GURL& active_url) override;
   void SetChildSurface(gpu::SurfaceHandle parent,
                        gpu::SurfaceHandle child) override;
   void StoreShaderToDisk(int32_t client_id,
                          const std::string& key,
@@ skipping 18 matching lines @@
 
   mojo::StrongBindingSet<mojom::Gpu> gpu_bindings_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuHost);
 };
 
 }  // namespace ws
 }  // namespace ui
 
 #endif  // SERVICES_UI_WS_GPU_HOST_H_