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

chrome/browser/sync/profile_sync_service_session_unittest.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 <map>
 #include <string>
 
 #include "base/location.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
@@ skipping 121 matching lines @@
       ASSERT_EQ(1U, tab->navigations.size());
       ASSERT_EQ(1, tab->tab_visual_index);
       ASSERT_EQ(0, tab->current_navigation_index);
       ASSERT_TRUE(tab->pinned);
       ASSERT_EQ("app_id", tab->extension_app_id);
       ASSERT_EQ(1U, tab->navigations.size());
       ASSERT_EQ(12, tab->navigations[0].index());
       ASSERT_EQ(tab->navigations[0].virtual_url(), GURL("http://foo/1"));
       ASSERT_EQ(tab->navigations[0].referrer(), GURL("referrer"));
       ASSERT_EQ(tab->navigations[0].title(), string16(ASCIIToUTF16("title")));
-      ASSERT_EQ(tab->navigations[0].transition(), PageTransition::TYPED);
+      ASSERT_EQ(tab->navigations[0].transition(),
+                content::PAGE_TRANSITION_TYPED);
     }
   }
 }
 
 }  // namespace
 
 class ProfileSyncServiceSessionTest
     : public BrowserWithTestWindowTest,
       public NotificationObserver {
  public:
@@ skipping 635 matching lines @@
   session_reference.push_back(tab_list1);
   VerifySyncedSession(tag, session_reference, *(foreign_sessions[0]));
 
   // Now delete the foreign session.
   model_associator_->DeleteForeignSession(tag);
   ASSERT_FALSE(model_associator_->GetAllForeignSessions(&foreign_sessions));
 
 }
 
 }  // namespace browser_sync