Move WaitForLoadStop from ui_test_utils to browser_test_utils so that it can be reused in content_b…

chrome/browser/tab_contents/render_view_context_menu_browsertest.cc

Index: chrome/browser/tab_contents/render_view_context_menu_browsertest.cc
===================================================================
--- chrome/browser/tab_contents/render_view_context_menu_browsertest.cc	(revision 148448)
+++ chrome/browser/tab_contents/render_view_context_menu_browsertest.cc	(working copy)
@@ -21,6 +21,7 @@
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_view.h"
+#include "content/public/test/browser_test_utils.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebContextMenuData.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebInputEvent.h"
 
@@ -130,7 +131,7 @@
   // be added.
   tab_observer.Wait();
   tab = tab_observer.GetTab();
-  ui_test_utils::WaitForLoadStop(tab);
+  content::WaitForLoadStop(tab);
 
   // Verify that it's the correct tab.
   EXPECT_EQ(GURL("about:blank"), tab->GetURL());