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

chrome/browser/infobars/infobar_delegate.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/infobars/infobar_delegate.h"
 
 #include "base/logging.h"
 #include "build/build_config.h"
 #include "chrome/browser/infobars/infobar_tab_helper.h"
 #include "content/browser/tab_contents/navigation_details.h"
@@ skipping 73 matching lines @@
 void InfoBarDelegate::StoreActiveEntryUniqueID(
     InfoBarTabHelper* infobar_helper) {
   NavigationEntry* active_entry =
       infobar_helper->tab_contents()->controller().GetActiveEntry();
   contents_unique_id_ = active_entry ? active_entry->unique_id() : 0;
 }
 
 bool InfoBarDelegate::ShouldExpireInternal(
     const content::LoadCommittedDetails& details) const {
   return (contents_unique_id_ != details.entry->unique_id()) ||
-      (PageTransition::StripQualifier(details.entry->transition_type()) ==
-          PageTransition::RELOAD);
+      (content::PageTransitionStripQualifier(
+          details.entry->transition_type()) == content::PAGE_TRANSITION_RELOAD);
 }
 
 void InfoBarDelegate::RemoveSelf() {
   if (owner_)
     owner_->RemoveInfoBar(this);  // Clears |owner_|.
 }