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

content/browser/tab_contents/tab_contents_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 "content/browser/tab_contents/tab_contents_delegate.h"
 
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "base/memory/singleton.h"
 #include "content/browser/javascript_dialogs.h"
 #include "content/browser/tab_contents/tab_contents.h"
 #include "content/common/url_constants.h"
 #include "ui/gfx/rect.h"
 #include "webkit/glue/web_intent_data.h"
 
 TabContentsDelegate::TabContentsDelegate() {
 }
 
 TabContents* TabContentsDelegate::OpenURLFromTab(
     TabContents* source,
     const GURL& url,
     const GURL& referrer,
     WindowOpenDisposition disposition,
-    PageTransition::Type transition) {
+    content::PageTransition transition) {
   return OpenURLFromTab(source,
                         OpenURLParams(url, referrer, disposition, transition));
 }
 
 TabContents* TabContentsDelegate::OpenURLFromTab(TabContents* source,
                                                  const OpenURLParams& params) {
   return NULL;
 }
 
 void TabContentsDelegate::NavigationStateChanged(const TabContents* source,
@@ skipping 117 matching lines @@
                                            const GURL& page_url) {
   // Fall back implementation based entirely on the view-source scheme.
   // It suffers from http://crbug.com/523 and that is why browser overrides
   // it with proper implementation.
   GURL url = GURL(chrome::kViewSourceScheme + std::string(":") +
                       page_url.spec());
   OpenURLFromTab(source,
                  url,
                  GURL(),
                  NEW_FOREGROUND_TAB,
-                 PageTransition::LINK);
+                 content::PAGE_TRANSITION_LINK);
 }
 
 void TabContentsDelegate::ViewSourceForFrame(TabContents* source,
                                              const GURL& frame_url,
                                              const std::string& content_state) {
   // Same as ViewSourceForTab, but for given subframe.
   GURL url = GURL(chrome::kViewSourceScheme + std::string(":") +
                       frame_url.spec());
   OpenURLFromTab(source,
                  url,
                  GURL(),
                  NEW_FOREGROUND_TAB,
-                 PageTransition::LINK);
+                 content::PAGE_TRANSITION_LINK);
 }
 
 bool TabContentsDelegate::PreHandleKeyboardEvent(
     const NativeWebKeyboardEvent& event,
     bool* is_keyboard_shortcut) {
   return false;
 }
 
 void TabContentsDelegate::HandleKeyboardEvent(
     const NativeWebKeyboardEvent& event) {
@@ skipping 150 matching lines @@
 
 void TabContentsDelegate::Attach(TabContents* tab_contents) {
   DCHECK(attached_contents_.find(tab_contents) == attached_contents_.end());
   attached_contents_.insert(tab_contents);
 }
 
 void TabContentsDelegate::Detach(TabContents* tab_contents) {
   DCHECK(attached_contents_.find(tab_contents) != attached_contents_.end());
   attached_contents_.erase(tab_contents);
 }