Refactor ShellDesktopController and ShellNativeAppWindow to allow for non-aura implementations.

extensions/shell/browser/shell_browser_main_delegate.h

Index: extensions/shell/browser/shell_browser_main_delegate.h
diff --git a/extensions/shell/browser/shell_browser_main_delegate.h b/extensions/shell/browser/shell_browser_main_delegate.h
index 1b234c514d3c131a6f8a3485d66b6ea5a6cf08f2..a11721e319a46ce21af0ef91cf4101f43af77bad 100644
--- a/extensions/shell/browser/shell_browser_main_delegate.h
+++ b/extensions/shell/browser/shell_browser_main_delegate.h
@@ -25,7 +25,8 @@ class ShellBrowserMainDelegate {
   // other services such as BrowserContext / extension system are shut down.
   virtual void Shutdown() = 0;
 
-  // Creates the ShellDesktopController instance to initialize the root window
+  // Creates the ShellDesktopControllerAura instance to initialize the root
+  // window

[James Cook, 2014/11/11 18:23:52]

rewrap comment

[Yoyo Zhou, 2014/11/15 01:05:44]

Done.

   // and window manager. Subclass may return its subclass to customize the
   // windo manager.
   virtual DesktopController* CreateDesktopController() = 0;