Rename RootWindowHost* to WindowTreeHost*

ui/views/widget/native_widget_aura.cc

 // 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.
 
 #include "ui/views/widget/native_widget_aura.h"
 
 #include "base/bind.h"
 #include "base/strings/string_util.h"
 #include "third_party/skia/include/core/SkRegion.h"
 #include "ui/aura/client/activation_client.h"
@@ skipping 665 matching lines @@
     move_client->EndMoveLoop();
 }
 
 void NativeWidgetAura::SetVisibilityChangedAnimationsEnabled(bool value) {
   if (window_)
     window_->SetProperty(aura::client::kAnimationsDisabledKey, !value);
 }
 
 ui::NativeTheme* NativeWidgetAura::GetNativeTheme() const {
 #if !defined(OS_CHROMEOS)
-  return DesktopRootWindowHost::GetNativeTheme(window_);
+  return DesktopWindowTreeHost::GetNativeTheme(window_);
 #else
   return ui::NativeThemeAura::instance();
 #endif
 }
 
 void NativeWidgetAura::OnRootViewLayout() const {
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // NativeWidgetAura, views::InputMethodDelegate implementation:
@@ skipping 295 matching lines @@
       // widgets it seems relatively safe to skip the extra processing of
       // Close.
       widget->CloseNow();
   }
 }
 #endif
 
 #if defined(OS_WIN)
 BOOL CALLBACK WindowCallbackProc(HWND hwnd, LPARAM lParam) {
   aura::Window* root_window =
-      DesktopRootWindowHostWin::GetContentWindowForHWND(hwnd);
+      DesktopWindowTreeHostWin::GetContentWindowForHWND(hwnd);
   CloseWindow(root_window);
   return TRUE;
 }
 #endif
 }  // namespace
 
 // static
 void Widget::CloseAllSecondaryWidgets() {
 #if defined(OS_WIN)
   EnumThreadWindows(GetCurrentThreadId(), WindowCallbackProc, 0);
 #endif
 
 #if defined(USE_X11) && !defined(OS_CHROMEOS)
   std::vector<aura::Window*> open_windows =
-      DesktopRootWindowHostX11::GetAllOpenWindows();
+      DesktopWindowTreeHostX11::GetAllOpenWindows();
   std::for_each(open_windows.begin(), open_windows.end(), CloseWindow);
-  DesktopRootWindowHostX11::CleanUpWindowList();
+  DesktopWindowTreeHostX11::CleanUpWindowList();
 #endif
 }
 
 bool Widget::ConvertRect(const Widget* source,
                          const Widget* target,
                          gfx::Rect* rect) {
   return false;
 }
 
 namespace internal {
@@ skipping 118 matching lines @@
   return aura::Env::GetInstance()->IsMouseButtonDown();
 }
 
 // static
 bool NativeWidgetPrivate::IsTouchDown() {
   return aura::Env::GetInstance()->is_touch_down();
 }
 
 }  // namespace internal
 }  // namespace views