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

chrome/browser/ui/views/constrained_html_delegate_views.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/ui/webui/constrained_html_ui.h"
 
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
 #include "chrome/browser/ui/views/constrained_window_views.h"
@@ skipping 81 matching lines @@
       html_tab_contents_(profile, NULL, MSG_ROUTING_NONE, NULL, NULL),
       html_delegate_(delegate),
       window_(NULL),
       closed_via_webui_(false) {
   CHECK(delegate);
   html_tab_contents_.set_delegate(this);
 
   // Set |this| as a property so the ConstrainedHtmlUI can retrieve it.
   ConstrainedHtmlUI::GetPropertyAccessor().SetProperty(
       html_tab_contents_.property_bag(), this);
-  html_tab_contents_.controller().LoadURL(delegate->GetDialogContentURL(),
-                                          GURL(),
-                                          PageTransition::START_PAGE,
-                                          std::string());
+  html_tab_contents_.controller().LoadURL(
+      delegate->GetDialogContentURL(),
+      GURL(),
+      content::PAGE_TRANSITION_START_PAGE,
+      std::string());
 }
 
 ConstrainedHtmlDelegateViews::~ConstrainedHtmlDelegateViews() {
 }
 
 HtmlDialogUIDelegate* ConstrainedHtmlDelegateViews::GetHtmlDialogUIDelegate() {
   return html_delegate_;
 }
 
 void ConstrainedHtmlDelegateViews::OnDialogCloseFromWebUI() {
   closed_via_webui_ = true;
   window_->CloseConstrainedWindow();
 }
 
 // static
 ConstrainedWindow* ConstrainedHtmlUI::CreateConstrainedHtmlDialog(
     Profile* profile,
     HtmlDialogUIDelegate* delegate,
     TabContentsWrapper* container) {
   ConstrainedHtmlDelegateViews* constrained_delegate =
       new ConstrainedHtmlDelegateViews(profile, delegate);
   ConstrainedWindow* constrained_window =
       new ConstrainedWindowViews(container, constrained_delegate);
   constrained_delegate->set_window(constrained_window);
   return constrained_window;
 }