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

chrome/browser/sessions/session_restore.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/sessions/session_restore.h"
 
 #include <algorithm>
 #include <list>
 #include <set>
 #include <vector>
@@ skipping 733 matching lines @@
 
   // Appends the urls in |urls| to |browser|.
   void AppendURLsToBrowser(Browser* browser,
                            const std::vector<GURL>& urls) {
     for (size_t i = 0; i < urls.size(); ++i) {
       int add_types = TabStripModel::ADD_FORCE_INDEX;
       if (i == 0)
         add_types |= TabStripModel::ADD_ACTIVE;
       int index = browser->GetIndexForInsertionDuringRestore(i);
       browser::NavigateParams params(browser, urls[i],
-                                     PageTransition::START_PAGE);
+                                     content::PAGE_TRANSITION_START_PAGE);
       params.disposition = i == 0 ? NEW_FOREGROUND_TAB : NEW_BACKGROUND_TAB;
       params.tabstrip_index = index;
       params.tabstrip_add_types = add_types;
       browser::Navigate(&params);
     }
   }
 
   // Invokes TabRestored on the SessionService for all tabs in browser after
   // initial_count.
   void NotifySessionServiceOfRestoredTabs(Browser* browser, int initial_count) {
@@ skipping 93 matching lines @@
   std::vector<GURL> gurls;
   SessionRestoreImpl restorer(profile,
       static_cast<Browser*>(NULL), true, false, true, gurls);
   restorer.RestoreForeignTab(tab);
 }
 
 // static
 bool SessionRestore::IsRestoring() {
   return restoring;
 }