gpu: Introduce separate mojo api for failed initialization.

services/ui/gpu/gpu_service.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_GPU_GPU_SERVICE_H_
 #define SERVICES_UI_GPU_GPU_SERVICE_H_
 
 #include "base/callback.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/non_thread_safe.h"
@@ skipping 39 matching lines @@
              std::unique_ptr<gpu::GpuWatchdogThread> watchdog,
              gpu::GpuMemoryBufferFactory* memory_buffer_factory,
              scoped_refptr<base::SingleThreadTaskRunner> io_runner,
              const gpu::GpuFeatureInfo& gpu_feature_info);
 
   ~GpuService() override;
 
   void UpdateGPUInfoFromPreferences(const gpu::GpuPreferences& preferences);
 
   void InitializeWithHost(mojom::GpuHostPtr gpu_host,
-                          const gpu::GpuPreferences& preferences,
                           gpu::GpuProcessActivityFlags activity_flags,
                           gpu::SyncPointManager* sync_point_manager = nullptr,
                           base::WaitableEvent* shutdown_event = nullptr);
   void Bind(mojom::GpuServiceRequest request);
 
   media::MediaGpuChannelManager* media_gpu_channel_manager() {
     return media_gpu_channel_manager_.get();
   }
 
   gpu::GpuChannelManager* gpu_channel_manager() {
@@ skipping 114 matching lines @@
   base::Time start_time_;
 
   mojo::BindingSet<mojom::GpuService> bindings_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuService);
 };
 
 }  // namespace ui
 
 #endif  // SERVICES_UI_GPU_GPU_SERVICE_H_