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

content/shell/shell_resource_dispatcher_host_delegate.cc

Index: content/shell/shell_resource_dispatcher_host_delegate.cc
===================================================================
--- content/shell/shell_resource_dispatcher_host_delegate.cc	(revision 148205)
+++ content/shell/shell_resource_dispatcher_host_delegate.cc	(working copy)
@@ -24,6 +24,12 @@
 ResourceDispatcherHostLoginDelegate*
 ShellResourceDispatcherHostDelegate::CreateLoginDelegate(
     net::AuthChallengeInfo* auth_info, net::URLRequest* request) {
+  if (!login_request_callback_.is_null()) {
+    login_request_callback_.Run();
+    login_request_callback_.Reset();
+    return NULL;
+  }
+
 #if !defined(OS_MACOSX)
 // TODO: implement ShellLoginDialog for other platforms, drop this #if
   return NULL;