Revert of content/common: Remove use of MessageLoopProxy and deprecated MessageLoop APIs

content/common/gpu/gpu_channel.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 CONTENT_COMMON_GPU_GPU_CHANNEL_H_
 #define CONTENT_COMMON_GPU_GPU_CHANNEL_H_
 
 #include <deque>
 #include <string>
 
@@ skipping 11 matching lines @@
 #include "gpu/command_buffer/service/valuebuffer_manager.h"
 #include "ipc/ipc_sync_channel.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gl/gl_share_group.h"
 #include "ui/gl/gpu_preference.h"
 
 struct GPUCreateCommandBufferConfig;
 
 namespace base {
+class MessageLoopProxy;
 class WaitableEvent;
 }
 
 namespace gpu {
 class PreemptionFlag;
 union ValueState;
 class ValueStateMap;
 namespace gles2 {
 class SubscriptionRefSet;
 }
@@ skipping 16 matching lines @@
   // Takes ownership of the renderer process handle.
   GpuChannel(GpuChannelManager* gpu_channel_manager,
              GpuWatchdog* watchdog,
              gfx::GLShareGroup* share_group,
              gpu::gles2::MailboxManager* mailbox_manager,
              int client_id,
              bool software,
              bool allow_future_sync_points);
   ~GpuChannel() override;
 
-  void Init(base::SingleThreadTaskRunner* io_task_runner,
+  void Init(base::MessageLoopProxy* io_message_loop,
             base::WaitableEvent* shutdown_event);
 
   // Get the GpuChannelManager that owns this channel.
   GpuChannelManager* gpu_channel_manager() const {
     return gpu_channel_manager_;
   }
 
   // Returns the name of the associated IPC channel.
   std::string GetChannelName();
 
 #if defined(OS_POSIX)
   base::ScopedFD TakeRendererFileDescriptor();
 #endif  // defined(OS_POSIX)
 
   base::ProcessId renderer_pid() const { return channel_->GetPeerPID(); }
 
   int client_id() const { return client_id_; }
 
-  scoped_refptr<base::SingleThreadTaskRunner> io_task_runner() const {
-    return io_task_runner_;
+  scoped_refptr<base::MessageLoopProxy> io_message_loop() const {
+    return io_message_loop_;
   }
 
   // IPC::Listener implementation:
   bool OnMessageReceived(const IPC::Message& msg) override;
   void OnChannelError() override;
 
   // IPC::Sender implementation:
   bool Send(IPC::Message* msg) override;
 
   // Requeue the message that is currently being processed to the beginning of
@@ skipping 131 matching lines @@
   StubMap stubs_;
 
   bool log_messages_;  // True if we should log sent and received messages.
   gpu::gles2::DisallowedFeatures disallowed_features_;
   GpuWatchdog* watchdog_;
   bool software_;
   bool handle_messages_scheduled_;
   IPC::Message* currently_processing_message_;
 
   scoped_refptr<GpuChannelMessageFilter> filter_;
-  scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
+  scoped_refptr<base::MessageLoopProxy> io_message_loop_;
 
   size_t num_stubs_descheduled_;
 
   bool allow_future_sync_points_;
 
   // Member variables should appear before the WeakPtrFactory, to ensure
   // that any WeakPtrs to Controller are invalidated before its members
   // variable's destructors are executed, rendering them invalid.
   base::WeakPtrFactory<GpuChannel> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuChannel);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_GPU_CHANNEL_H_