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

content/browser/tab_contents/tab_contents_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 "content/browser/tab_contents/tab_contents_observer.h"
 
 #include "content/browser/renderer_host/render_view_host.h"
 #include "content/browser/tab_contents/navigation_details.h"
 #include "content/browser/tab_contents/tab_contents.h"
 
@@ skipping 25 matching lines @@
 
 void TabContentsObserver::ProvisionalChangeToMainFrameUrl(
     const GURL& url,
     const GURL& opener_url) {
 }
 
 void TabContentsObserver::DidCommitProvisionalLoadForFrame(
     int64 frame_id,
     bool is_main_frame,
     const GURL& url,
-    PageTransition::Type transition_type) {
+    content::PageTransition transition_type) {
 }
 
 void TabContentsObserver::DidFailProvisionalLoad(
     int64 frame_id,
     bool is_main_frame,
     const GURL& validated_url,
     int error_code,
     const string16& error_description) {
 }
 
@@ skipping 20 matching lines @@
 
 void TabContentsObserver::RenderViewGone() {
 }
 
 void TabContentsObserver::StopNavigation() {
 }
 
 void TabContentsObserver::DidOpenURL(const GURL& url,
                                      const GURL& referrer,
                                      WindowOpenDisposition disposition,
-                                     PageTransition::Type transition) {
+                                     content::PageTransition transition) {
 }
 
-void TabContentsObserver::DidOpenRequestedURL(TabContents* new_contents,
-                                              const GURL& url,
-                                              const GURL& referrer,
-                                              WindowOpenDisposition disposition,
-                                              PageTransition::Type transition,
-                                              int64 source_frame_id) {
+void TabContentsObserver::DidOpenRequestedURL(
+    TabContents* new_contents,
+    const GURL& url,
+    const GURL& referrer,
+    WindowOpenDisposition disposition,
+    content::PageTransition transition,
+    int64 source_frame_id) {
 }
 
 void TabContentsObserver::AppCacheAccessed(const GURL& manifest_url,
                                            bool blocked_by_policy) {
 }
 
 TabContentsObserver::TabContentsObserver(TabContents* tab_contents)
     : tab_contents_(NULL), routing_id_(MSG_ROUTING_NONE) {
   Observe(tab_contents);
 }
@@ skipping 41 matching lines @@
 }
 
 void TabContentsObserver::TabContentsDestroyed() {
   // Do cleanup so that 'this' can safely be deleted from
   // TabContentsDestroyed.
   tab_contents_->RemoveObserver(this);
   TabContents* tab = tab_contents_;
   tab_contents_ = NULL;
   TabContentsDestroyed(tab);
 }