Revert 177182 - ViewTest.ChangeNativeViewHierarchyFindRoots failure

ui/views/examples/content_client/examples_browser_main_parts.h

Index: ui/views/examples/content_client/examples_browser_main_parts.h
===================================================================
--- ui/views/examples/content_client/examples_browser_main_parts.h	(revision 177189)
+++ ui/views/examples/content_client/examples_browser_main_parts.h	(working copy)
@@ -9,6 +9,12 @@
 #include "base/memory/scoped_ptr.h"
 #include "content/public/browser/browser_main_parts.h"
 
+namespace aura {
+namespace client {
+class StackingClient;
+}
+}
+
 namespace content {
 class ShellBrowserContext;
 struct MainFunctionParams;
@@ -38,6 +44,9 @@
   scoped_ptr<content::ShellBrowserContext> browser_context_;
 
   scoped_ptr<ViewsDelegate> views_delegate_;
+#if defined(USE_AURA)
+  scoped_ptr<aura::client::StackingClient> stacking_client_;
+#endif
 
   DISALLOW_COPY_AND_ASSIGN(ExamplesBrowserMainParts);
 };