Move WebUIMessageHandler to its own file in the public directory and put it in the content namesp...

chrome/browser/ui/webui/web_ui_browsertest.h

Index: chrome/browser/ui/webui/web_ui_browsertest.h
===================================================================
--- chrome/browser/ui/webui/web_ui_browsertest.h	(revision 116051)
+++ chrome/browser/ui/webui/web_ui_browsertest.h	(working copy)
@@ -16,12 +16,15 @@
 #include "content/test/test_navigation_observer.h"
 
 class RenderViewHost;
-class WebUIMessageHandler;
 
 namespace base {
 class Value;
 }
 
+namespace content {
+class WebUIMessageHandler;
+}
+
 // This macro simplifies the declaration of simple javascript unit tests.
 // Use:
 //   WEB_UI_UNITTEST_F(MyWebUIPageTest, myJavascriptUnittest);
@@ -134,7 +137,7 @@
   void SetWebUIInstance(WebUI* web_ui);
 
   // Returns a mock WebUI object under test (if any).
-  virtual WebUIMessageHandler* GetMockMessageHandler();
+  virtual content::WebUIMessageHandler* GetMockMessageHandler();
 
   // Returns a file:// GURL constructed from |path| inside the test data dir for
   // webui tests.