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

chrome/browser/ui/gtk/tabs/dragged_tab_controller_gtk.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 "chrome/browser/ui/gtk/tabs/dragged_tab_controller_gtk.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 156 matching lines @@
 ////////////////////////////////////////////////////////////////////////////////
 // DraggedTabControllerGtk, TabContentsDelegate implementation:
 
 // TODO(adriansc): Remove this method once refactoring has changed all call
 // sites.
 TabContents* DraggedTabControllerGtk::OpenURLFromTab(
     TabContents* source,
     const GURL& url,
     const GURL& referrer,
     WindowOpenDisposition disposition,
-    PageTransition::Type transition) {
+    content::PageTransition transition) {
   return OpenURLFromTab(source,
                         OpenURLParams(url, referrer, disposition, transition));
 }
 
 TabContents* DraggedTabControllerGtk::OpenURLFromTab(
     TabContents* source,
     const OpenURLParams& params) {
   if (drag_data_->GetSourceTabData()->original_delegate_) {
     OpenURLParams forward_params = params;
     if (params.disposition == CURRENT_TAB)
@@ skipping 708 matching lines @@
 
 bool DraggedTabControllerGtk::AreTabsConsecutive() {
   for (size_t i = 1; i < drag_data_->size(); ++i) {
     if (drag_data_->get(i - 1)->source_model_index_ + 1 !=
         drag_data_->get(i)->source_model_index_) {
       return false;
     }
   }
   return true;
 }