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

chrome/browser/printing/cloud_print/cloud_print_setup_flow.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/printing/cloud_print/cloud_print_setup_flow.h"
 
 #include "base/json/json_writer.h"
 #include "base/memory/singleton.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
@@ skipping 243 matching lines @@
     authenticator_->StartClientLogin(user, password,
                                      GaiaConstants::kCloudPrintService,
                                      last_auth_error_.captcha().token, captcha,
                                      GaiaAuthFetcher::HostedAccountsAllowed);
   }
 }
 
 void CloudPrintSetupFlow::OnUserClickedLearnMore() {
   web_ui_->tab_contents()->OpenURL(CloudPrintURL::GetCloudPrintLearnMoreURL(),
                                    GURL(), NEW_FOREGROUND_TAB,
-                                   PageTransition::LINK);
+                                   content::PAGE_TRANSITION_LINK);
 }
 
 void CloudPrintSetupFlow::OnUserClickedPrintTestPage() {
   web_ui_->tab_contents()->OpenURL(CloudPrintURL::GetCloudPrintTestPageURL(),
                                    GURL(), NEW_FOREGROUND_TAB,
-                                   PageTransition::LINK);
+                                   content::PAGE_TRANSITION_LINK);
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 // Helper methods for showing contents of the Web UI
 void CloudPrintSetupFlow::ShowGaiaLogin(const DictionaryValue& args) {
   if (web_ui_)
     web_ui_->CallJavascriptFunction("cloudprint.showSetupLogin");
 
   std::string json;
   base::JSONWriter::Write(&args, false, &json);
@@ skipping 49 matching lines @@
 }
 
 void CloudPrintSetupFlow::ExecuteJavascriptInIFrame(
     const string16& iframe_xpath,
     const string16& js) {
   if (web_ui_) {
     RenderViewHost* rvh = web_ui_->tab_contents()->render_view_host();
     rvh->ExecuteJavascriptInWebFrame(iframe_xpath, js);
   }
 }