Support sharing of ContentMain and BrowserMain code with embedded use cases (try #3).

chrome_frame/test/net/fake_external_tab.cc

Index: chrome_frame/test/net/fake_external_tab.cc
===================================================================
--- chrome_frame/test/net/fake_external_tab.cc	(revision 121246)
+++ chrome_frame/test/net/fake_external_tab.cc	(working copy)
@@ -49,7 +49,7 @@
 #include "chrome_frame/test/simulate_input.h"
 #include "chrome_frame/test/win_event_receiver.h"
 #include "chrome_frame/utils.h"
-#include "content/app/content_main.h"
+#include "content/public/app/content_main.h"
 #include "content/public/app/startup_helper_win.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/notification_service.h"
@@ -613,6 +613,10 @@
   FilterDisabledTests();
 }
 
+MessageLoop* CFUrlRequestUnittestRunner::GetMainMessageLoop() {
+  return NULL;
+}
+
 int CFUrlRequestUnittestRunner::PreCreateThreads() {
   fake_chrome_.reset(new FakeExternalTab());
   fake_chrome_->Initialize();