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

chrome/browser/ui/cocoa/view_id_util_browsertest.mm

 // 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 "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/bookmarks/bookmark_model.h"
 #include "chrome/browser/bookmarks/bookmark_utils.h"
 #include "chrome/browser/download/download_shelf.h"
@@ skipping 89 matching lines @@
 }
 
 IN_PROC_BROWSER_TEST_F(ViewIDTest, Tab) {
   CheckViewID(VIEW_ID_TAB_0, true);
   CheckViewID(VIEW_ID_TAB_LAST, true);
 
   // Open 9 new tabs.
   for (int i = 1; i <= 9; ++i) {
     CheckViewID(static_cast<ViewID>(VIEW_ID_TAB_0 + i), false);
     browser()->OpenURL(GURL(chrome::kAboutBlankURL), GURL(),
-                       NEW_BACKGROUND_TAB, PageTransition::TYPED);
+                       NEW_BACKGROUND_TAB, content::PAGE_TRANSITION_TYPED);
     CheckViewID(static_cast<ViewID>(VIEW_ID_TAB_0 + i), true);
     // VIEW_ID_TAB_LAST should always be available.
     CheckViewID(VIEW_ID_TAB_LAST, true);
   }
 
   // Open the 11th tab.
   browser()->OpenURL(GURL(chrome::kAboutBlankURL), GURL(),
-                     NEW_BACKGROUND_TAB, PageTransition::TYPED);
+                     NEW_BACKGROUND_TAB, content::PAGE_TRANSITION_TYPED);
   CheckViewID(VIEW_ID_TAB_LAST, true);
 }