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.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_GTK_TABS_DRAGGED_TAB_CONTROLLER_GTK_H_
 #define CHROME_BROWSER_UI_GTK_TABS_DRAGGED_TAB_CONTROLLER_GTK_H_
 #pragma once
 
 #include <gtk/gtk.h>
 
@@ skipping 67 matching lines @@
 
     // The tab (NavigationController) was destroyed during the drag.
     TAB_DESTROYED
   };
 
   DraggedTabData InitDraggedTabData(TabGtk* tab);
 
   // Overridden from TabContentsDelegate:
   // Deprecated. Please use the two-arguments variant instead.
   // TODO(adriansc): Remove this method once refactoring changed all call sites.
-  virtual TabContents* OpenURLFromTab(TabContents* source,
-                                      const GURL& url,
-                                      const GURL& referrer,
-                                      WindowOpenDisposition disposition,
-                                      PageTransition::Type transition) OVERRIDE;
+  virtual TabContents* OpenURLFromTab(
+      TabContents* source,
+      const GURL& url,
+      const GURL& referrer,
+      WindowOpenDisposition disposition,
+      content::PageTransition transition) OVERRIDE;
   virtual TabContents* OpenURLFromTab(TabContents* source,
                                       const OpenURLParams& params) OVERRIDE;
   virtual void NavigationStateChanged(const TabContents* source,
                                       unsigned changed_flags);
   virtual void AddNewContents(TabContents* source,
                               TabContents* new_contents,
                               WindowOpenDisposition disposition,
                               const gfx::Rect& initial_pos,
                               bool user_gesture);
   virtual void LoadingStateChanged(TabContents* source);
@@ skipping 162 matching lines @@
 
   // Timer used to bring the window under the cursor to front. If the user
   // stops moving the mouse for a brief time over a browser window, it is
   // brought to front.
   base::OneShotTimer<DraggedTabControllerGtk> bring_to_front_timer_;
 
   DISALLOW_COPY_AND_ASSIGN(DraggedTabControllerGtk);
 };
 
 #endif  // CHROME_BROWSER_UI_GTK_TABS_DRAGGED_TAB_CONTROLLER_GTK_H_