Changed UrlFetcher to use a MessageLoopProxy instead of directly relying on C...

base/message_loop_proxy.h

Index: base/message_loop_proxy.h
===================================================================
--- base/message_loop_proxy.h	(revision 46098)
+++ base/message_loop_proxy.h	(working copy)
@@ -28,6 +28,9 @@
       const tracked_objects::Location& from_here,
       Task* task,
       int64 delay_ms) = 0;
+  // A method which checks if the caller is currently running in the thread that
+  // this proxy represents.
+  virtual bool BelongsToCurrentThread() = 0;
 
   template <class T>
   bool DeleteSoon(const tracked_objects::Location& from_here,