Adds the ability for MessageLoop to take a MessagePump

base/threading/thread.cc

Index: base/threading/thread.cc
diff --git a/base/threading/thread.cc b/base/threading/thread.cc
index aca4ddbaa02a11c37ef02b39b5e4c3da829f404e..3b99c2a4f802990b82b7ff19c7093c2a2a179dc2 100644
--- a/base/threading/thread.cc
+++ b/base/threading/thread.cc
@@ -174,8 +174,14 @@ void Thread::ThreadMain() {
   {
     // The message loop for this thread.
     // Allocated on the heap to centralize any leak reports at this line.
-    scoped_ptr<MessageLoop> message_loop(
-        new MessageLoop(startup_data_->options.message_loop_type));
+    scoped_ptr<MessageLoop> message_loop;
+    if (!startup_data_->options.message_pump_factory.is_null()) {
+      message_loop.reset(
+          new MessageLoop(startup_data_->options.message_pump_factory.Run()));
+    } else {
+      message_loop.reset(
+          new MessageLoop(startup_data_->options.message_loop_type));
+    }
 
     // Complete the initialization of our Thread object.
     thread_id_ = PlatformThread::CurrentId();