Rename RootWindowHost* to WindowTreeHost*

ui/aura/remote_root_window_host_win.h

Index: ui/aura/remote_root_window_host_win.h
diff --git a/ui/aura/remote_root_window_host_win.h b/ui/aura/remote_root_window_host_win.h
index a295109a8d5ab8f9f76a0265364b1e564e4da691..5be111761ce42886d087312a08c461500e427ab8 100644
--- a/ui/aura/remote_root_window_host_win.h
+++ b/ui/aura/remote_root_window_host_win.h
@@ -94,17 +94,17 @@ AURA_EXPORT void HandleActivateDesktop(
     const base::FilePath& shortcut,
     bool ash_exit);
 
-// RootWindowHost implementaton that receives events from a different
+// WindowTreeHost 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 RemoteWindowTreeHostWin
+    : public WindowTreeHost,
       public ui::internal::RemoteInputMethodDelegateWin {
  public:
-  // Returns the only RemoteRootWindowHostWin, if this is the first time
+  // Returns the only RemoteWindowTreeHostWin, 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);
+  static RemoteWindowTreeHostWin* Instance();
+  static RemoteWindowTreeHostWin* 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
@@ -159,8 +159,8 @@ class AURA_EXPORT RemoteRootWindowHostWin
   bool IsForegroundWindow();
 
  private:
-  explicit RemoteRootWindowHostWin(const gfx::Rect& bounds);
-  virtual ~RemoteRootWindowHostWin();
+  explicit RemoteWindowTreeHostWin(const gfx::Rect& bounds);
+  virtual ~RemoteWindowTreeHostWin();
 
   // IPC message handing methods:
   void OnMouseMoved(int32 x, int32 y, int32 flags);
@@ -201,7 +201,7 @@ class AURA_EXPORT RemoteRootWindowHostWin
   void OnImeTextCommitted(const base::string16& text);
   void OnImeInputSourceChanged(uint16 language_id, bool is_ime);
 
-  // RootWindowHost overrides:
+  // WindowTreeHost overrides:
   virtual RootWindow* GetRootWindow() OVERRIDE;
   virtual gfx::AcceleratedWidget GetAcceleratedWidget() OVERRIDE;
   virtual void Show() OVERRIDE;
@@ -231,7 +231,7 @@ class AURA_EXPORT RemoteRootWindowHostWin
       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
+  // The default target is the WindowTreeHostDelegate. 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.
@@ -284,7 +284,7 @@ class AURA_EXPORT RemoteRootWindowHostWin
   // Current size of this root window.
   gfx::Size window_size_;
 
-  DISALLOW_COPY_AND_ASSIGN(RemoteRootWindowHostWin);
+  DISALLOW_COPY_AND_ASSIGN(RemoteWindowTreeHostWin);
 };
 
 }  // namespace aura