Enable basic IME functionality under Ash on Windows

ui/aura/remote_root_window_host_win.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 UI_AURA_REMOTE_ROOT_WINDOW_HOST_WIN_H_
 #define UI_AURA_REMOTE_ROOT_WINDOW_HOST_WIN_H_
 
 #include <vector>
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/strings/string16.h"
 #include "ui/aura/window_tree_host.h"
+#include "ui/base/ime/remote_input_method_delegate_win.h"
 #include "ui/events/event.h"
 #include "ui/events/event_constants.h"
 #include "ui/gfx/native_widget_types.h"
+#include "ui/metro_viewer/ime_types.h"
 
 namespace base {
 class FilePath;
 }
 
 namespace ui {
+class RemoteInputMethodPrivateWin;
 class ViewProp;
 }
 
 namespace IPC {
 class Message;
 class Sender;
 }
 
 namespace aura {
 
@@ skipping 52 matching lines @@
 
 // Handles the activate desktop command for Metro Chrome Ash. The on_success
 // callback passed in is invoked when activation is completed.
 AURA_EXPORT void HandleActivateDesktop(
     const base::FilePath& shortcut,
     const ActivateDesktopCompleted& on_success);
 
 // RootWindowHost implementaton that receives events from a different
 // process. In the case of Windows this is the Windows 8 (aka Metro)
 // frontend process, which forwards input events to this class.
-class AURA_EXPORT RemoteRootWindowHostWin : public RootWindowHost {
+class AURA_EXPORT RemoteRootWindowHostWin
+    : public RootWindowHost,
+      public ui::internal::RemoteInputMethodDelegateWin {
  public:
   // Returns the only RemoteRootWindowHostWin, if this is the first time
   // this function is called, it will call Create() wiht empty bounds.
   static RemoteRootWindowHostWin* Instance();
   static RemoteRootWindowHostWin* Create(const gfx::Rect& bounds);
 
   // Called when the remote process has established its IPC connection.
   // The |host| can be used when we need to send a message to it and
   // |remote_window| is the actual window owned by the viewer process.
   void Connected(IPC::Sender* host, HWND remote_window);
@@ skipping 72 matching lines @@
   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);
   void OnSetCursorPosAck();
   void OnDesktopActivated();
 
+  // For Input Method support:
+  ui::RemoteInputMethodPrivateWin* GetRemoteInputMethodPrivate();
+  void OnImeCompositionChanged(
+      const string16& text,
+      int32 selection_start,
+      int32 selection_end,
+      const std::vector<metro_viewer::UnderlineInfo>& underlines);
+  void OnImeTextCommitted(const string16& text);
+
   // RootWindowHost overrides:
   virtual RootWindow* GetRootWindow() OVERRIDE;
   virtual gfx::AcceleratedWidget GetAcceleratedWidget() OVERRIDE;
   virtual void Show() OVERRIDE;
   virtual void Hide() OVERRIDE;
   virtual void ToggleFullScreen() OVERRIDE;
   virtual gfx::Rect GetBounds() const OVERRIDE;
   virtual void SetBounds(const gfx::Rect& bounds) OVERRIDE;
   virtual gfx::Insets GetInsets() const OVERRIDE;
   virtual void SetInsets(const gfx::Insets& insets) OVERRIDE;
   virtual gfx::Point GetLocationOnNativeScreen() const OVERRIDE;
   virtual void SetCapture() OVERRIDE;
   virtual void ReleaseCapture() OVERRIDE;
   virtual void SetCursor(gfx::NativeCursor cursor) OVERRIDE;
   virtual bool QueryMouseLocation(gfx::Point* location_return) OVERRIDE;
   virtual bool ConfineCursorToRootWindow() OVERRIDE;
   virtual void UnConfineCursor() OVERRIDE;
   virtual void OnCursorVisibilityChanged(bool show) OVERRIDE;
   virtual void MoveCursorTo(const gfx::Point& location) OVERRIDE;
   virtual void PostNativeEvent(const base::NativeEvent& native_event) OVERRIDE;
   virtual void OnDeviceScaleFactorChanged(float device_scale_factor) OVERRIDE;
   virtual void PrepareForShutdown() OVERRIDE;
 
+  // ui::internal::RemoteInputMethodDelegateWin overrides:
+  virtual void CancelComposition() OVERRIDE;
+  virtual void OnTextInputClientUpdated(
+      const std::vector<int32>& input_scopes,
+      const std::vector<gfx::Rect>& composition_character_bounds) OVERRIDE;
+
   // Helper function to dispatch a keyboard message to the desired target.
   // The default target is the RootWindowHostDelegate. For nested message loop
   // invocations we post a synthetic keyboard message directly into the message
   // loop. The dispatcher for the nested loop would then decide how this
   // message is routed.
   void DispatchKeyboardMessage(ui::EventType type,
                                uint32 vkey,
                                uint32 repeat_count,
                                uint32 scan_code,
                                uint32 flags,
@@ skipping 44 matching lines @@
 
   // Current size of this root window.
   gfx::Size window_size_;
 
   DISALLOW_COPY_AND_ASSIGN(RemoteRootWindowHostWin);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_REMOTE_ROOT_WINDOW_HOST_WIN_H_