Created a stock implementation of the MessageLoopProxy interface than can be ...

chrome/test/testing_profile.cc

Index: chrome/test/testing_profile.cc
===================================================================
--- chrome/test/testing_profile.cc	(revision 46408)
+++ chrome/test/testing_profile.cc	(working copy)
@@ -108,7 +108,7 @@
       context_ = new TestURLRequestContext();
     return context_.get();
   }
-  virtual scoped_refptr<MessageLoopProxy> GetIOMessageLoopProxy() {
+  virtual scoped_refptr<base::MessageLoopProxy> GetIOMessageLoopProxy() {
     return ChromeThread::GetMessageLoopProxyForThread(ChromeThread::IO);
   }
 
@@ -133,7 +133,7 @@
       context_ = new TestExtensionURLRequestContext();
     return context_.get();
   }
-  virtual scoped_refptr<MessageLoopProxy> GetIOMessageLoopProxy() {
+  virtual scoped_refptr<base::MessageLoopProxy> GetIOMessageLoopProxy() {
     return ChromeThread::GetMessageLoopProxyForThread(ChromeThread::IO);
   }