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

content/common/resource_dispatcher.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.
 
 // See http://dev.chromium.org/developers/design-documents/multi-process-resource-loading
 
 #include "content/common/resource_dispatcher.h"
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
@@ skipping 85 matching lines @@
   request_.has_user_gesture = request_info.has_user_gesture;
   if (request_info.extra_data) {
     RequestExtraData* extra_data =
         static_cast<RequestExtraData*>(request_info.extra_data);
     request_.is_main_frame = extra_data->is_main_frame();
     request_.frame_id = extra_data->frame_id();
     request_.transition_type = extra_data->transition_type();
   } else {
     request_.is_main_frame = false;
     request_.frame_id = -1;
-    request_.transition_type = PageTransition::LINK;
+    request_.transition_type = content::PAGE_TRANSITION_LINK;
   }
 }
 
 IPCResourceLoaderBridge::~IPCResourceLoaderBridge() {
   // we remove our hook for the resource dispatcher only when going away, since
   // it doesn't keep track of whether we've force terminated the request
   if (request_id_ >= 0) {
     // this operation may fail, as the dispatcher will have preemptively
     // removed us when the renderer sends the ReceivedAllData message.
     dispatcher_->RemovePendingRequest(request_id_);
@@ skipping 488 matching lines @@
 
 // static
 void ResourceDispatcher::ReleaseResourcesInMessageQueue(MessageQueue* queue) {
   while (!queue->empty()) {
     IPC::Message* message = queue->front();
     ReleaseResourcesInDataMessage(*message);
     queue->pop_front();
     delete message;
   }
 }