Revert 201806 "Create MetroViewerProcessHost as a common base fo..."

trunk/src/win8/viewer/metro_viewer_process_host.h

-// Copyright (c) 2013 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 WIN8_VIEWER_METRO_VIEWER_PROCESS_HOST_H_
-#define WIN8_VIEWER_METRO_VIEWER_PROCESS_HOST_H_
-
-#include <string>
-
-#include "base/basictypes.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/string16.h"
-#include "base/threading/non_thread_safe.h"
-#include "ipc/ipc_channel_proxy.h"
-#include "ipc/ipc_listener.h"
-#include "ipc/ipc_sender.h"
-#include "ui/gfx/native_widget_types.h"
-
-namespace base {
-class SingleThreadTaskRunner;
-class WaitableEvent;
-}
-
-namespace IPC {
-class Message;
-}
-
-namespace win8 {
-
-// Abstract base class for various Metro viewer process host implementations.
-class MetroViewerProcessHost : public IPC::Listener,
-                               public IPC::Sender,
-                               public base::NonThreadSafe {
- public:
-  // Initializes a viewer process host over |ipc_channel_name|. The given task
-  // runner correspond to a thread on which IPC::Channel is created and used
-  // (e.g. IO thread). Instantly connects to the viewer process if one is
-  // already connected to |ipc_channel_name|; a viewer can otherwise be
-  // launched synchronously via LaunchViewerAndWaitForConnection().
-  MetroViewerProcessHost(const std::string& ipc_channel_name,
-                         base::SingleThreadTaskRunner* ipc_task_runner);
-  virtual ~MetroViewerProcessHost();
-
-  // Returns the process id of the viewer process if one is connected to this
-  // host, returns base::kNullProcessId otherwise.
-  base::ProcessId GetViewerProcessId();
-
-  // Launches the viewer process associated with the given |app_user_model_id|
-  // and blocks until that viewer process connects or until a timeout is
-  // reached. Returns true if the viewer process connects before the timeout is
-  // reached. NOTE: this assumes that the app referred to by |app_user_model_id|
-  // is registered as the default browser.
-  bool LaunchViewerAndWaitForConnection(
-      const base::string16& app_user_model_id);
-
- private:
-  // IPC::Sender implementation:
-  virtual bool Send(IPC::Message* msg) OVERRIDE;
-
-  // IPC::Listener implementation:
-  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
-  virtual void OnChannelError() OVERRIDE = 0;
-
-  // Called over IPC by the viewer process to tell this host that it should be
-  // be drawing to |target_surface|.
-  virtual void OnSetTargetSurface(gfx::NativeViewId target_surface) = 0;
-
-  void NotifyChannelConnected();
-
-  // Inner message filter used to handle connection event on the IPC channel
-  // proxy's background thread. This prevents consumers of
-  // MetroViewerProcessHost from having to pump messages on their own message
-  // loop.
-  class InternalMessageFilter : public IPC::ChannelProxy::MessageFilter {
-   public:
-    InternalMessageFilter(MetroViewerProcessHost* owner);
-
-    // IPC::ChannelProxy::MessageFilter implementation.
-    virtual void OnChannelConnected(int32 peer_pid) OVERRIDE;
-
-   private:
-    MetroViewerProcessHost* owner_;
-    DISALLOW_COPY_AND_ASSIGN(InternalMessageFilter);
-  };
-
-  scoped_ptr<IPC::ChannelProxy> channel_;
-  scoped_ptr<base::WaitableEvent> channel_connected_event_;
-
-  DISALLOW_COPY_AND_ASSIGN(MetroViewerProcessHost);
-};
-
-}  // namespace win8
-
-#endif  // WIN8_VIEWER_METRO_VIEWER_PROCESS_HOST_H_