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

content/browser/tab_contents/tab_contents.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 CONTENT_BROWSER_TAB_CONTENTS_TAB_CONTENTS_H_
 #define CONTENT_BROWSER_TAB_CONTENTS_TAB_CONTENTS_H_
 #pragma once
 
 #include <deque>
 #include <map>
@@ skipping 237 matching lines @@
 
   // Commands ------------------------------------------------------------------
 
   // Implementation of PageNavigator.
 
   // Deprecated. Please use the one-argument variant instead.
   // TODO(adriansc): Remove this method once refactoring changed all call sites.
   virtual TabContents* OpenURL(const GURL& url,
                                const GURL& referrer,
                                WindowOpenDisposition disposition,
-                               PageTransition::Type transition) OVERRIDE;
+                               content::PageTransition transition) OVERRIDE;
 
   virtual TabContents* OpenURL(const OpenURLParams& params) OVERRIDE;
 
   // Called by the NavigationController to cause the TabContents to navigate to
   // the current pending entry. The NavigationController should be called back
   // with RendererDidNavigate on success or DiscardPendingEntry on failure.
   // The callbacks can be inside of this function, or at some future time.
   //
   // The entry has a PageID of -1 if newly created (corresponding to navigation
   // to a new URL).
@@ skipping 575 matching lines @@
   ObserverList<TabContentsObserver> observers_;
 
   // Content restrictions, used to disable print/copy etc based on content's
   // (full-page plugins for now only) permissions.
   int content_restrictions_;
 
   DISALLOW_COPY_AND_ASSIGN(TabContents);
 };
 
 #endif  // CONTENT_BROWSER_TAB_CONTENTS_TAB_CONTENTS_H_