beginnings of metro viewer process

ui/viewer/viewer_ipc_server.h

Index: ui/viewer/viewer_ipc_server.h
diff --git a/ui/viewer/viewer_ipc_server.h b/ui/viewer/viewer_ipc_server.h
new file mode 100644
index 0000000000000000000000000000000000000000..f2f5a8163ba895fe6e4cb96fb13b00fe622c228a
--- /dev/null
+++ b/ui/viewer/viewer_ipc_server.h
@@ -0,0 +1,58 @@
+// 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 UI_VIEWER_VIEWER_IPC_SERVER_H_
+#define UI_VIEWER_VIEWER_IPC_SERVER_H_
+
+#include <string>
+
+#include "base/memory/scoped_ptr.h"
+#include "ipc/ipc_channel_handle.h"
+#include "ipc/ipc_listener.h"
+#include "ipc/ipc_sync_channel.h"
+#include "ipc/ipc_sync_message_filter.h"
+#include "ipc/ipc_sender.h"
+
+// This class handles IPC commands for the Viewer process.
+class ViewerIPCServer : public IPC::Listener, public IPC::Sender {
+ public:
+  explicit ViewerIPCServer(const IPC::ChannelHandle& handle);
+  virtual ~ViewerIPCServer();
+
+  bool Init();
+
+  // IPC::Sender implementation.
+  virtual bool Send(IPC::Message* msg) OVERRIDE;
+
+  IPC::SyncChannel* channel() { return channel_.get(); }
+
+  // Safe to call on any thread, as long as it's guaranteed that the thread's
+  // lifetime is less than the main thread.
+  IPC::SyncMessageFilter* sync_message_filter() { return sync_message_filter_; }
+
+ private:
+

[tfarina, 2012/08/28 01:14:15]

rm this extra blank line.

+  // IPC::Listener implementation.
+  virtual bool OnMessageReceived(const IPC::Message& msg) OVERRIDE;
+  virtual void OnChannelConnected(int32 peer_pid) OVERRIDE;
+  virtual void OnChannelError() OVERRIDE;
+
+  // IPC message handlers.
+  void OnPbufferHandle(const std::string& todo);
+
+  // Helper method to create the sync channel.
+  void CreateChannel();
+
+  bool client_connected_;
+
+  IPC::ChannelHandle channel_handle_;
+  scoped_ptr<IPC::SyncChannel> channel_;
+
+  // Allows threads other than the main thread to send sync messages.
+  scoped_refptr<IPC::SyncMessageFilter> sync_message_filter_;
+
+  DISALLOW_COPY_AND_ASSIGN(ViewerIPCServer);
+};
+
+#endif  // UI_VIEWER_VIEWER_IPC_SERVER_H_