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

chrome/browser/extensions/extension_history_api.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/extensions/extension_history_api.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/json/json_writer.h"
@@ skipping 35 matching lines @@
 }
 
 void GetVisitInfoDictionary(const history::VisitRow& row,
                             DictionaryValue* value) {
   value->SetString(keys::kIdKey, base::Int64ToString(row.url_id));
   value->SetString(keys::kVisitId, base::Int64ToString(row.visit_id));
   value->SetDouble(keys::kVisitTime, MilliSecondsFromTime(row.visit_time));
   value->SetString(keys::kReferringVisitId,
                    base::Int64ToString(row.referring_visit));
 
-  const char* trans = PageTransition::CoreTransitionString(row.transition);
+  const char* trans =
+      content::PageTransitionGetCoreTransitionString(row.transition);
   DCHECK(trans) << "Invalid transition.";
   value->SetString(keys::kTransition, trans);
 }
 
 void AddVisitNode(const history::VisitRow& row, ListValue* list) {
   DictionaryValue* dict = new DictionaryValue();
   GetVisitInfoDictionary(row, dict);
   list->Append(dict);
 }
 
@@ skipping 303 matching lines @@
       &cancelable_consumer_,
       base::Bind(&DeleteAllHistoryFunction::DeleteComplete,
                  base::Unretained(this)));
 
   return true;
 }
 
 void DeleteAllHistoryFunction::DeleteComplete() {
   SendAsyncResponse();
 }