gpu: Introduce separate mojo api for failed initialization.

services/ui/ws/gpu_host.cc

 // 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.
 
 #include "services/ui/ws/gpu_host.h"
 
 #include "base/memory/ptr_util.h"
 #include "base/memory/shared_memory.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
@@ skipping 75 matching lines @@
   gpu_bindings_.AddBinding(std::move(client), std::move(request));
   return client_ref;
 }
 
 void GpuHost::OnBadMessageFromGpu() {
   // TODO(sad): Received some unexpected message from the gpu process. We
   // should kill the process and restart it.
   NOTIMPLEMENTED();
 }
 
-void GpuHost::DidInitialize(const gpu::GPUInfo& gpu_info) {
+void GpuHost::DidInitialize(const gpu::GPUInfo& gpu_info,
+                            const gpu::GpuFeatureInfo& gpu_feature_info) {
   gpu_info_ = gpu_info;
   delegate_->OnGpuServiceInitialized();
 }
 
+void GpuHost::DidFailInitialize() {}
+
 void GpuHost::DidCreateOffscreenContext(const GURL& url) {}
 
 void GpuHost::DidDestroyOffscreenContext(const GURL& url) {}
 
 void GpuHost::DidDestroyChannel(int32_t client_id) {}
 
 void GpuHost::DidLoseContext(bool offscreen,
                              gpu::error::ContextLostReason reason,
                              const GURL& active_url) {}
 
@@ skipping 22 matching lines @@
 void GpuHost::StoreShaderToDisk(int32_t client_id,
                                 const std::string& key,
                                 const std::string& shader) {}
 
 void GpuHost::RecordLogMessage(int32_t severity,
                                const std::string& header,
                                const std::string& message) {}
 
 }  // namespace ws
 }  // namespace ui