Move all the layout tests that ran under browser_tests to run under content_browsertests.

content/shell/shell_content_browser_client.h

Index: content/shell/shell_content_browser_client.h
===================================================================
--- content/shell/shell_content_browser_client.h	(revision 148205)
+++ content/shell/shell_content_browser_client.h	(working copy)
@@ -40,6 +40,10 @@
 #endif
 
   ShellBrowserContext* browser_context();
+  ShellBrowserContext* off_the_record_browser_context();
+  ShellResourceDispatcherHostDelegate* resource_dispatcher_host_delegate() {
+    return resource_dispatcher_host_delegate_.get();
+  }
 
  private:
   scoped_ptr<ShellResourceDispatcherHostDelegate>