gpu: Introduce GpuChannelEstablishFactory.

gpu/ipc/client/gpu_channel_host.h

 // Copyright (c) 2012 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 GPU_IPC_CLIENT_GPU_CHANNEL_HOST_H_
 #define GPU_IPC_CLIENT_GPU_CHANNEL_HOST_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 25 matching lines @@
 namespace IPC {
 class SyncMessageFilter;
 }
 
 namespace gpu {
 class GpuMemoryBufferManager;
 }
 
 namespace gpu {
 
+class GpuChannelHost;
+using GpuChannelEstablishedCallback =
+    base::Callback<void(scoped_refptr<GpuChannelHost>)>;
+
+class GPU_EXPORT GpuChannelEstablishFactory {
+ public:
+  virtual ~GpuChannelEstablishFactory() {}
+
+  virtual void EstablishGpuChannel(
+      const GpuChannelEstablishedCallback& callback) = 0;
+  virtual scoped_refptr<GpuChannelHost> EstablishGpuChannelSync() = 0;
+
+  static void SetInstance(GpuChannelEstablishFactory* instance);
+  static GpuChannelEstablishFactory* GetInstance();
+};
+
 class GPU_EXPORT GpuChannelHostFactory {
  public:
   virtual ~GpuChannelHostFactory() {}
 
   virtual bool IsMainThread() = 0;
   virtual scoped_refptr<base::SingleThreadTaskRunner>
   GetIOThreadTaskRunner() = 0;
   virtual std::unique_ptr<base::SharedMemory> AllocateSharedMemory(
       size_t size) = 0;
 };
@@ skipping 211 matching lines @@
   mutable base::Lock context_lock_;
   std::unique_ptr<IPC::SyncChannel> channel_;
   base::hash_map<int32_t, StreamFlushInfo> stream_flush_info_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuChannelHost);
 };
 
 }  // namespace gpu
 
 #endif  // GPU_IPC_CLIENT_GPU_CHANNEL_HOST_H_