Reland of move remote tree host and some related input and metro_driver code

win8/viewer/metro_viewer_process_host.h

Index: win8/viewer/metro_viewer_process_host.h
diff --git a/win8/viewer/metro_viewer_process_host.h b/win8/viewer/metro_viewer_process_host.h
deleted file mode 100644
index 2b1a56f7eb81be49b2986714c4b1fca9cc11e508..0000000000000000000000000000000000000000
--- a/win8/viewer/metro_viewer_process_host.h
+++ /dev/null
@@ -1,221 +0,0 @@
-// 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 <stdint.h>
-
-#include "base/callback.h"
-#include "base/macros.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/strings/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 "ipc/message_filter.h"
-#include "ui/gfx/native_widget_types.h"
-#include "win8/viewer/metro_viewer_exports.h"
-
-namespace base {
-class SingleThreadTaskRunner;
-class WaitableEvent;
-}
-
-namespace IPC {
-class ChannelProxy;
-class Message;
-}
-
-namespace win8 {
-
-// Abstract base class for various Metro viewer process host implementations.
-class METRO_VIEWER_EXPORT MetroViewerProcessHost : public IPC::Listener,
-                                                   public IPC::Sender,
-                                                   public base::NonThreadSafe {
- public:
-  typedef base::Callback<void(const base::FilePath&, int, void*)>
-      OpenFileCompletion;
-
-  typedef base::Callback<void(const std::vector<base::FilePath>&, void*)>
-      OpenMultipleFilesCompletion;
-
-  typedef base::Callback<void(const base::FilePath&, int, void*)>
-      SaveFileCompletion;
-
-  typedef base::Callback<void(const base::FilePath&, int, void*)>
-      SelectFolderCompletion;
-
-  typedef base::Callback<void(void*)> FileSelectionCanceled;
-
-  // Initializes a viewer process host to connect to the Metro viewer process
-  // over IPC. 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().
-  explicit MetroViewerProcessHost(
-      const scoped_refptr<base::SingleThreadTaskRunner>& ipc_task_runner);
-  ~MetroViewerProcessHost() override;
-
-  // 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);
-
-  // Handles the activate desktop command for Metro Chrome Ash. The |ash_exit|
-  // parameter indicates whether the Ash process would be shutdown after
-  // activating the desktop.
-  static void HandleActivateDesktop(const base::FilePath& shortcut,
-                                    bool ash_exit);
-
-  // Handles the metro exit command.  Notifies the metro viewer to shutdown
-  // gracefully.
-  static void HandleMetroExit();
-
-  // Handles the open file operation for Metro Chrome Ash. The on_success
-  // callback passed in is invoked when we receive the opened file name from
-  // the metro viewer. The on failure callback is invoked on failure.
-  static void HandleOpenFile(const base::string16& title,
-                             const base::FilePath& default_path,
-                             const base::string16& filter,
-                             const OpenFileCompletion& on_success,
-                             const FileSelectionCanceled& on_failure);
-
-  // Handles the open multiple file operation for Metro Chrome Ash. The
-  // on_success callback passed in is invoked when we receive the opened file
-  // names from the metro viewer. The on failure callback is invoked on failure.
-  static void HandleOpenMultipleFiles(
-      const base::string16& title,
-      const base::FilePath& default_path,
-      const base::string16& filter,
-      const OpenMultipleFilesCompletion& on_success,
-      const FileSelectionCanceled& on_failure);
-
-  // Handles the save file operation for Metro Chrome Ash. The on_success
-  // callback passed in is invoked when we receive the saved file name from
-  // the metro viewer. The on failure callback is invoked on failure.
-  static void HandleSaveFile(const base::string16& title,
-                             const base::FilePath& default_path,
-                             const base::string16& filter,
-                             int filter_index,
-                             const base::string16& default_extension,
-                             const SaveFileCompletion& on_success,
-                             const FileSelectionCanceled& on_failure);
-
-  // Handles the select folder for Metro Chrome Ash. The on_success
-  // callback passed in is invoked when we receive the folder name from the
-  // metro viewer. The on failure callback is invoked on failure.
-  static void HandleSelectFolder(const base::string16& title,
-                                 const SelectFolderCompletion& on_success,
-                                 const FileSelectionCanceled& on_failure);
-
- protected:
-  // IPC::Sender implementation:
-  bool Send(IPC::Message* msg) override;
-
-  // IPC::Listener implementation:
-  bool OnMessageReceived(const IPC::Message& message) override;
-  void OnChannelError() override = 0;
-
- private:
-  // The following are the implementation for the corresponding static methods
-  // above, see them for descriptions.
-  void HandleOpenFileImpl(const base::string16& title,
-                          const base::FilePath& default_path,
-                          const base::string16& filter,
-                          const OpenFileCompletion& on_success,
-                          const FileSelectionCanceled& on_failure);
-  void HandleOpenMultipleFilesImpl(
-      const base::string16& title,
-      const base::FilePath& default_path,
-      const base::string16& filter,
-      const OpenMultipleFilesCompletion& on_success,
-      const FileSelectionCanceled& on_failure);
-  void HandleSaveFileImpl(const base::string16& title,
-                          const base::FilePath& default_path,
-                          const base::string16& filter,
-                          int filter_index,
-                          const base::string16& default_extension,
-                          const SaveFileCompletion& on_success,
-                          const FileSelectionCanceled& on_failure);
-  void HandleSelectFolderImpl(const base::string16& title,
-                              const SelectFolderCompletion& on_success,
-                              const FileSelectionCanceled& on_failure);
-
-  // Called over IPC by the viewer process to tell this host that it should be
-  // drawing to |target_surface|.
-  virtual void OnSetTargetSurface(gfx::NativeViewId target_surface,
-                                  float device_scale) = 0;
-
-  // Called over IPC by the viewer process to request that the url passed in be
-  // opened.
-  virtual void OnOpenURL(const base::string16& url) = 0;
-
-  // Called over IPC by the viewer process to request that the search string
-  // passed in is passed to the default search provider and a URL navigation be
-  // performed.
-  virtual void OnHandleSearchRequest(const base::string16& search_string) = 0;
-
-  // Called over IPC by the viewer process when the window size has changed.
-  virtual void OnWindowSizeChanged(uint32_t width, uint32_t height) = 0;
-
-  void NotifyChannelConnected();
-
-  // IPC message handing methods:
-  void OnFileSaveAsDone(bool success,
-                        const base::FilePath& filename,
-                        int filter_index);
-  void OnFileOpenDone(bool success, const base::FilePath& filename);
-  void OnMultiFileOpenDone(bool success,
-                           const std::vector<base::FilePath>& files);
-  void OnSelectFolderDone(bool success, const base::FilePath& folder);
-
-  // 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::MessageFilter {
-   public:
-    InternalMessageFilter(MetroViewerProcessHost* owner);
-
-    // IPC::MessageFilter implementation.
-    void OnChannelConnected(int32_t peer_pid) override;
-
-   private:
-    ~InternalMessageFilter() override;
-
-    MetroViewerProcessHost* owner_;
-    DISALLOW_COPY_AND_ASSIGN(InternalMessageFilter);
-  };
-
-  scoped_ptr<IPC::ChannelProxy> channel_;
-  scoped_ptr<base::WaitableEvent> channel_connected_event_;
-  scoped_refptr<InternalMessageFilter> message_filter_;
-
-  static MetroViewerProcessHost* instance_;
-
-  // Saved callbacks which inform the caller about the result of the open file/
-  // save file/select operations.
-  OpenFileCompletion file_open_completion_callback_;
-  OpenMultipleFilesCompletion multi_file_open_completion_callback_;
-  SaveFileCompletion file_saveas_completion_callback_;
-  SelectFolderCompletion select_folder_completion_callback_;
-  FileSelectionCanceled failure_callback_;
-
-  DISALLOW_COPY_AND_ASSIGN(MetroViewerProcessHost);
-};
-
-}  // namespace win8
-
-#endif  // WIN8_VIEWER_METRO_VIEWER_PROCESS_HOST_H_