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

chrome/browser/autocomplete/autocomplete_popup_model.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/autocomplete/autocomplete_popup_model.h"
 
 #include <algorithm>
 
 #include "unicode/ubidi.h"
 
@@ skipping 116 matching lines @@
   view_->OnDragCanceled();
 }
 
 bool AutocompletePopupModel::GetKeywordForMatch(const AutocompleteMatch& match,
                                                 string16* keyword) const {
   // Assume we have no keyword until we find otherwise.
   keyword->clear();
 
   if (match.template_url &&
       TemplateURL::SupportsReplacement(match.template_url) &&
-      match.transition == PageTransition::KEYWORD) {
+      match.transition == content::PAGE_TRANSITION_KEYWORD) {
     // The current match is a keyword, return that as the selected keyword.
     keyword->assign(match.template_url->keyword());
     return false;
   }
 
   // See if the current match's fill_into_edit corresponds to a keyword.
   return GetKeywordForText(match.fill_into_edit, keyword);
 }
 
 bool AutocompletePopupModel::GetKeywordForText(const string16& text,
@@ skipping 96 matching lines @@
   CHECK((selected_line_ != kNoMatch) || result.empty());
   manually_selected_match_.Clear();
   // If we're going to trim the window size to no longer include the hovered
   // line, turn hover off.  Practically, this shouldn't happen, but it
   // doesn't hurt to be defensive.
   if ((hovered_line_ != kNoMatch) && (result.size() <= hovered_line_))
     SetHoveredLine(kNoMatch);
 
   view_->UpdatePopupAppearance();
 }