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

chrome/browser/history/in_memory_history_backend.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/history/in_memory_history_backend.h"
 
 #include <set>
 #include <vector>
 
 #include "base/command_line.h"
@@ skipping 61 matching lines @@
                  source);
   registrar_.Add(this, chrome::NOTIFICATION_TEMPLATE_URL_REMOVED, source);
 }
 
 void InMemoryHistoryBackend::Observe(int type,
                                      const NotificationSource& source,
                                      const NotificationDetails& details) {
   switch (type) {
     case chrome::NOTIFICATION_HISTORY_URL_VISITED: {
       Details<history::URLVisitedDetails> visited_details(details);
-      PageTransition::Type primary_type =
-          PageTransition::StripQualifier(visited_details->transition);
+      content::PageTransition primary_type =
+          content::PageTransitionStripQualifier(visited_details->transition);
       if (visited_details->row.typed_count() > 0 ||
-          primary_type == PageTransition::KEYWORD ||
+          primary_type == content::PAGE_TRANSITION_KEYWORD ||
           HasKeyword(visited_details->row.url())) {
         URLsModifiedDetails modified_details;
         modified_details.changed_urls.push_back(visited_details->row);
         OnTypedURLsModified(modified_details);
       }
       break;
     }
     case chrome::NOTIFICATION_HISTORY_KEYWORD_SEARCH_TERM_UPDATED:
       OnKeywordSearchTermUpdated(
           *Details<history::KeywordSearchTermDetails>(details).ptr());
@@ skipping 91 matching lines @@
 
 bool InMemoryHistoryBackend::HasKeyword(const GURL& url) {
   URLID id = db_->GetRowForURL(url, NULL);
   if (!id)
     return false;
 
   return db_->GetKeywordSearchTermRow(id, NULL);
 }
 
 }  // namespace history