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

content/browser/renderer_host/render_view_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/render_view_host.h"
 
 #include <string>
 #include <utility>
 #include <vector>
 
@@ skipping 239 matching lines @@
       RenderViewHostObserver, observers_, Navigate(params));
 }
 
 void RenderViewHost::NavigateToURL(const GURL& url) {
   ViewMsg_Navigate_Params params;
   params.page_id = -1;
   params.pending_history_list_offset = -1;
   params.current_history_list_offset = -1;
   params.current_history_list_length = 0;
   params.url = url;
-  params.transition = PageTransition::LINK;
+  params.transition = content::PAGE_TRANSITION_LINK;
   params.navigation_type = ViewMsg_Navigate_Type::NORMAL;
   Navigate(params);
 }
 
 void RenderViewHost::SetNavigationsSuspended(bool suspend) {
   // This should only be called to toggle the state.
   DCHECK(navigations_suspended_ != suspend);
 
   navigations_suspended_ = suspend;
   if (!suspend && suspended_nav_message_.get()) {
@@ skipping 537 matching lines @@
     return;
 
   // If we're waiting for a cross-site beforeunload ack from this renderer and
   // we receive a Navigate message from the main frame, then the renderer was
   // navigating already and sent it before hearing the ViewMsg_Stop message.
   // We do not want to cancel the pending navigation in this case, since the
   // old page will soon be stopped.  Instead, treat this as a beforeunload ack
   // to allow the pending navigation to continue.
   if (is_waiting_for_beforeunload_ack_ &&
       unload_ack_is_for_cross_site_transition_ &&
-      PageTransition::IsMainFrame(validated_params.transition)) {
+      content::PageTransitionIsMainFrame(validated_params.transition)) {
     OnMsgShouldCloseACK(true);
     return;
   }
 
   // If we're waiting for an unload ack from this renderer and we receive a
   // Navigate message, then the renderer was navigating before it received the
   // unload request.  It will either respond to the unload request soon or our
   // timer will expire.  Either way, we should ignore this message, because we
   // have already committed to closing this renderer.
   if (is_waiting_for_unload_ack_)
@@ skipping 580 matching lines @@
 void RenderViewHost::OnRunFileChooser(
     const ViewHostMsg_RunFileChooser_Params& params) {
   delegate_->RunFileChooser(this, params);
 }
 
 void RenderViewHost::OnWebUISend(const GURL& source_url,
                                  const std::string& name,
                                  const base::ListValue& args) {
   delegate_->WebUISend(this, source_url, name, args);
 }