Use base::MessageLoop in more files.

net/proxy/proxy_resolver_v8_tracing.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/proxy/proxy_resolver_v8_tracing.h"
 
 #include "base/bind.h"
 #include "base/message_loop_proxy.h"
 #include "base/metrics/histogram.h"
 #include "base/stringprintf.h"
@@ skipping 453 matching lines @@
   callback_.Reset();
 
   // For good measure, clear this other user-owned pointer.
   user_results_ = NULL;
 }
 
 ProxyResolverV8* ProxyResolverV8Tracing::Job::v8_resolver() {
   return parent_->v8_resolver_.get();
 }
 
-MessageLoop* ProxyResolverV8Tracing::Job::worker_loop() {
+base::MessageLoop* ProxyResolverV8Tracing::Job::worker_loop() {
   return parent_->thread_->message_loop();
 }
 
 HostResolver* ProxyResolverV8Tracing::Job::host_resolver() {
   return parent_->host_resolver_;
 }
 
 ProxyResolverErrorObserver* ProxyResolverV8Tracing::Job::error_observer() {
   return parent_->error_observer_.get();
 }
@@ skipping 657 matching lines @@
   DCHECK(!set_pac_script_job_);
   CHECK_EQ(0, num_outstanding_callbacks_);
 
   set_pac_script_job_ = new Job(this);
   set_pac_script_job_->StartSetPacScript(script_data, callback);
 
   return ERR_IO_PENDING;
 }
 
 }  // namespace net