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

chrome/browser/history/history.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.
 
 // The history system runs on a background thread so that potentially slow
 // database operations don't delay the browser. This backend processing is
 // represented by HistoryBackend. The HistoryService's job is to dispatch to
 // that thread.
 //
 // Main thread                       History thread
@@ skipping 301 matching lines @@
 
 void HistoryService::SetOnBackendDestroyTask(Task* task) {
   ScheduleAndForget(PRIORITY_NORMAL, &HistoryBackend::SetOnBackendDestroyTask,
                     MessageLoop::current(), task);
 }
 
 void HistoryService::AddPage(const GURL& url,
                              const void* id_scope,
                              int32 page_id,
                              const GURL& referrer,
-                             PageTransition::Type transition,
+                             content::PageTransition transition,
                              const history::RedirectList& redirects,
                              history::VisitSource visit_source,
                              bool did_replace_entry) {
   AddPage(url, Time::Now(), id_scope, page_id, referrer, transition, redirects,
           visit_source, did_replace_entry);
 }
 
 void HistoryService::AddPage(const GURL& url,
                              Time time,
                              const void* id_scope,
                              int32 page_id,
                              const GURL& referrer,
-                             PageTransition::Type transition,
+                             content::PageTransition transition,
                              const history::RedirectList& redirects,
                              history::VisitSource visit_source,
                              bool did_replace_entry) {
   scoped_refptr<history::HistoryAddPageArgs> request(
       new history::HistoryAddPageArgs(url, time, id_scope, page_id, referrer,
                                       redirects, transition, visit_source,
                                       did_replace_entry));
   AddPage(*request);
 }
 
@@ skipping 500 matching lines @@
     history::TopSites* ts = profile_->GetTopSitesWithoutCreating();
     if (ts)
       ts->MigrateFromHistory();
   }
 }
 
 void HistoryService::OnTopSitesReady() {
   ScheduleAndForget(PRIORITY_NORMAL,
                     &HistoryBackend::MigrateThumbnailsDatabase);
 }