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

chrome/browser/ui/cocoa/history_menu_bridge_unittest.mm

 // 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.
 
 #import <Cocoa/Cocoa.h>
 #include <vector>
 
 #include "base/memory/ref_counted_memory.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/string_util.h"
@@ skipping 76 matching lines @@
     item->title = title;
     item->url = GURL(title);
     return item;
   }
 
   MockTRS::Tab CreateSessionTab(const GURL& url, const string16& title) {
     MockTRS::Tab tab;
     tab.current_navigation_index = 0;
     tab.navigations.push_back(
         TabNavigation(0, url, GURL(), title, std::string(),
-                      PageTransition::LINK));
+                      content::PAGE_TRANSITION_LINK));
     return tab;
   }
 
   void GetFaviconForHistoryItem(HistoryMenuBridge::HistoryItem* item) {
     bridge_->GetFaviconForHistoryItem(item);
   }
 
   void GotFaviconData(FaviconService::Handle handle,
                       history::FaviconData favicon) {
     bridge_->GotFaviconData(handle, favicon);
@@ skipping 269 matching lines @@
   favicon.icon_type = history::FAVICON;
   GotFaviconData(item.icon_handle, favicon);
 
   // Make sure the callback works.
   EXPECT_FALSE(item.icon_requested);
   EXPECT_TRUE(item.icon.get());
   EXPECT_TRUE([item.menu_item image]);
 }
 
 }  // namespace