Fix a regression where extension APIs would sometimes not be available on the

content/browser/renderer_host/mock_render_process_host.cc

 // Copyright (c) 2011 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 "content/browser/renderer_host/mock_render_process_host.h"
 
 #include "content/browser/child_process_security_policy.h"
 
 MockRenderProcessHost::MockRenderProcessHost(Profile* profile)
     : RenderProcessHost(profile),
       transport_dib_(NULL),
       bad_msg_count_(0),
       factory_(NULL) {
   // Child process security operations can't be unit tested unless we add
   // ourselves as an existing child process.
   ChildProcessSecurityPolicy::GetInstance()->Add(id());
 }
 
 MockRenderProcessHost::~MockRenderProcessHost() {
   ChildProcessSecurityPolicy::GetInstance()->Remove(id());
   delete transport_dib_;
   if (factory_)
     factory_->Remove(this);
 }
 
+void MockRenderProcessHost::EnableSendQueue() {
+}
+
 bool MockRenderProcessHost::Init(bool is_accessibility_enabled) {
   return true;
 }
 
 int MockRenderProcessHost::GetNextRoutingID() {
   static int prev_routing_id = 0;
   return ++prev_routing_id;
 }
 
 void MockRenderProcessHost::CancelResourceRequests(int render_widget_id) {
@@ skipping 94 matching lines @@
 
 void MockRenderProcessHostFactory::Remove(MockRenderProcessHost* host) const {
   for (ScopedVector<MockRenderProcessHost>::iterator it = processes_.begin();
        it != processes_.end(); ++it) {
     if (*it == host) {
       processes_.weak_erase(it);
       break;
     }
   }
 }