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

chrome/browser/extensions/file_manager_util.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/file_manager_util.h"
 
 #include "base/json/json_writer.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
@@ skipping 220 matching lines @@
     path.append(EscapeUrlEncodedData(full_path.value(), false));
     if (!BrowserThread::CurrentlyOn(BrowserThread::UI)) {
       bool result = BrowserThread::PostTask(
           BrowserThread::UI, FROM_HERE,
           NewRunnableFunction(&ViewItem, full_path, enqueue));
       DCHECK(result);
       return;
     }
     Browser* browser = BrowserList::GetLastActive();
     if (browser)
-      browser->AddSelectedTabWithURL(GURL(path), PageTransition::LINK);
+      browser->AddSelectedTabWithURL(GURL(path), content::PAGE_TRANSITION_LINK);
     return;
   }
 #if defined(OS_CHROMEOS)
   if (IsSupportedAVExtension(ext.data())) {
     Browser* browser = BrowserList::GetLastActive();
     if (!browser)
       return;
     MediaPlayer* mediaplayer = MediaPlayer::GetInstance();
 
     if (mediaplayer->GetPlaylist().empty())
@@ skipping 56 matching lines @@
     case SelectFileDialog::SELECT_OPEN_MULTI_FILE:
       type_str = "open-multi-file";
       break;
 
     default:
       NOTREACHED();
   }
 
   return type_str;
 }