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

chrome/browser/plugin_observer.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/plugin_observer.h"
 
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/content_settings/host_content_settings_map.h"
 #include "chrome/browser/google/google_util.h"
 #include "chrome/browser/infobars/infobar_tab_helper.h"
@@ skipping 52 matching lines @@
 
 bool PluginInfoBarDelegate::Cancel() {
   owner()->Send(new ChromeViewMsg_LoadBlockedPlugins(owner()->routing_id()));
   return true;
 }
 
 bool PluginInfoBarDelegate::LinkClicked(WindowOpenDisposition disposition) {
   owner()->tab_contents()->OpenURL(
       google_util::AppendGoogleLocaleParam(GURL(GetLearnMoreURL())), GURL(),
       (disposition == CURRENT_TAB) ? NEW_FOREGROUND_TAB : disposition,
-      PageTransition::LINK);
+      content::PAGE_TRANSITION_LINK);
   return false;
 }
 
 gfx::Image* PluginInfoBarDelegate::GetIcon() const {
   return &ResourceBundle::GetSharedInstance().GetNativeImageNamed(
       IDR_INFOBAR_PLUGIN_INSTALL);
 }
 
 string16 PluginInfoBarDelegate::GetLinkText() const {
   return l10n_util::GetStringUTF16(IDS_LEARN_MORE);
@@ skipping 164 matching lines @@
 
 string16 OutdatedPluginInfoBarDelegate::GetButtonLabel(
     InfoBarButton button) const {
   return l10n_util::GetStringUTF16((button == BUTTON_OK) ?
       IDS_PLUGIN_UPDATE : IDS_PLUGIN_ENABLE_TEMPORARILY);
 }
 
 bool OutdatedPluginInfoBarDelegate::Accept() {
   UserMetrics::RecordAction(UserMetricsAction("OutdatedPluginInfobar.Update"));
   owner()->tab_contents()->OpenURL(update_url_, GURL(), NEW_FOREGROUND_TAB,
-                                   PageTransition::LINK);
+                                   content::PAGE_TRANSITION_LINK);
   return false;
 }
 
 bool OutdatedPluginInfoBarDelegate::Cancel() {
   UserMetrics::RecordAction(
       UserMetricsAction("OutdatedPluginInfobar.AllowThisTime"));
   return PluginInfoBarDelegate::Cancel();
 }
 
 void OutdatedPluginInfoBarDelegate::InfoBarDismissed() {
@@ skipping 34 matching lines @@
 void PluginObserver::OnBlockedOutdatedPlugin(const string16& name,
                                              const GURL& update_url) {
   InfoBarTabHelper* infobar_helper = tab_contents_->infobar_tab_helper();
   infobar_helper->AddInfoBar(update_url.is_empty() ?
       static_cast<InfoBarDelegate*>(new BlockedPluginInfoBarDelegate(
           infobar_helper,
           tab_contents_->profile()->GetHostContentSettingsMap(),
           name)) :
       new OutdatedPluginInfoBarDelegate(infobar_helper, name, update_url));
 }