Move PageTransition into content namespace. While I'm touching all these files, I've also updated...

content/browser/renderer_host/resource_queue_unittest.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 "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
 #include "content/browser/browser_thread.h"
 #include "content/browser/mock_resource_context.h"
 #include "content/browser/renderer_host/dummy_resource_handler.h"
 #include "content/browser/renderer_host/global_request_id.h"
 #include "content/browser/renderer_host/resource_dispatcher_host_request_info.h"
 #include "content/browser/renderer_host/resource_queue.h"
 #include "googleurl/src/gurl.h"
 #include "net/url_request/url_request.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using content::DummyResourceHandler;
 
 namespace {
 
 const char kTestUrl[] = "data:text/plain,Hello World!";
 
 ResourceDispatcherHostRequestInfo* GetRequestInfo(int request_id) {
   return new ResourceDispatcherHostRequestInfo(
       new DummyResourceHandler(), ChildProcessInfo::RENDER_PROCESS, 0, 0, 0,
-      request_id, false, -1, ResourceType::MAIN_FRAME, PageTransition::LINK, 0,
-      false, false, false, content::MockResourceContext::GetInstance());
+      request_id, false, -1, ResourceType::MAIN_FRAME,
+      content::PAGE_TRANSITION_LINK, 0, false, false, false,
+      content::MockResourceContext::GetInstance());
 }
 
 void InitializeQueue(ResourceQueue* queue, ResourceQueueDelegate* delegate) {
   ResourceQueue::DelegateSet delegate_set;
   delegate_set.insert(delegate);
   queue->Initialize(delegate_set);
 }
 
 void InitializeQueue(ResourceQueue* queue,
                      ResourceQueueDelegate* delegate1,
@@ skipping 197 matching lines @@
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(0, response_started_count_);
 
   queue.Shutdown();
 
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(0, response_started_count_);
 }
 
 }  // namespace