Move root_window_host* in aura to window_tree_host*.

chrome/browser/ui/views/frame/browser_desktop_window_tree_host.h

Index: chrome/browser/ui/views/frame/browser_desktop_window_tree_host.h
diff --git a/chrome/browser/ui/views/frame/browser_desktop_root_window_host.h b/chrome/browser/ui/views/frame/browser_desktop_window_tree_host.h
similarity index 84%
rename from chrome/browser/ui/views/frame/browser_desktop_root_window_host.h
rename to chrome/browser/ui/views/frame/browser_desktop_window_tree_host.h
index 0d50a9bbb386d0edc0eb756a0daf832b2c7d9716..e44f3d457a80a55e077aa3019e7fc36d393ce4ac 100644
--- a/chrome/browser/ui/views/frame/browser_desktop_root_window_host.h
+++ b/chrome/browser/ui/views/frame/browser_desktop_window_tree_host.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CHROME_BROWSER_UI_VIEWS_FRAME_BROWSER_DESKTOP_ROOT_WINDOW_HOST_H_
-#define CHROME_BROWSER_UI_VIEWS_FRAME_BROWSER_DESKTOP_ROOT_WINDOW_HOST_H_
+#ifndef CHROME_BROWSER_UI_VIEWS_FRAME_BROWSER_DESKTOP_WINDOW_TREE_HOST_H_
+#define CHROME_BROWSER_UI_VIEWS_FRAME_BROWSER_DESKTOP_WINDOW_TREE_HOST_H_
 
 class BrowserFrame;
 class BrowserView;
@@ -39,4 +39,4 @@ class BrowserDesktopWindowTreeHost {
 };
 
 
-#endif  // CHROME_BROWSER_UI_VIEWS_FRAME_BROWSER_DESKTOP_ROOT_WINDOW_HOST_H_
+#endif  // CHROME_BROWSER_UI_VIEWS_FRAME_BROWSER_DESKTOP_WINDOW_TREE_HOST_H_