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

content/browser/tab_contents/navigation_entry.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/tab_contents/navigation_entry.h"
 
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "content/browser/content_browser_client.h"
 #include "content/browser/site_instance.h"
@@ skipping 22 matching lines @@
   bitmap_ = *content::GetContentClient()->browser()->GetDefaultFavicon();
 }
 
 
 NavigationEntry::NavigationEntry()
     : unique_id_(GetUniqueID()),
       site_instance_(NULL),
       page_type_(NORMAL_PAGE),
       update_virtual_url_with_url_(false),
       page_id_(-1),
-      transition_type_(PageTransition::LINK),
+      transition_type_(content::PAGE_TRANSITION_LINK),
       has_post_data_(false),
       restore_type_(RESTORE_NONE) {
 }
 
 NavigationEntry::NavigationEntry(SiteInstance* instance,
                                  int page_id,
                                  const GURL& url,
                                  const GURL& referrer,
                                  const string16& title,
-                                 PageTransition::Type transition_type)
+                                 content::PageTransition transition_type)
     : unique_id_(GetUniqueID()),
       site_instance_(instance),
       page_type_(NORMAL_PAGE),
       url_(url),
       referrer_(referrer),
       update_virtual_url_with_url_(false),
       title_(title),
       page_id_(page_id),
       transition_type_(transition_type),
       has_post_data_(false),
@@ skipping 34 matching lines @@
       title = title.substr(slashpos + 1);
   }
 
   ui::ElideString(title, content::kMaxTitleChars, &cached_display_title_);
   return cached_display_title_;
 }
 
 bool NavigationEntry::IsViewSourceMode() const {
   return virtual_url_.SchemeIs(chrome::kViewSourceScheme);
 }