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

chrome/browser/ui/panels/base_panel_browser_test.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/panels/base_panel_browser_test.h"
 
 #include "base/command_line.h"
 #include "base/mac/scoped_nsautorelease_pool.h"
 #include "base/message_loop.h"
 #include "chrome/browser/extensions/extension_service.h"
@@ skipping 222 matching lines @@
 
   Browser* panel_browser = Browser::CreateForApp(Browser::TYPE_PANEL,
                                                  params.name,
                                                  params.bounds,
                                                  browser()->profile());
   EXPECT_TRUE(panel_browser->is_type_panel());
 
   if (params.url.is_empty()) {
     TabContentsWrapper* tab_contents =
         new TabContentsWrapper(new TestTabContents(browser()->profile(), NULL));
-    panel_browser->AddTab(tab_contents, PageTransition::LINK);
+    panel_browser->AddTab(tab_contents, content::PAGE_TRANSITION_LINK);
   } else {
     panel_browser->AddSelectedTabWithURL(params.url,
-                                         PageTransition::START_PAGE);
+                                         content::PAGE_TRANSITION_START_PAGE);
     ui_test_utils::WaitForNavigation(
         &panel_browser->GetSelectedTabContents()->controller());
   }
 
   Panel* panel = static_cast<Panel*>(panel_browser->window());
   if (params.show_flag == SHOW_AS_ACTIVE)
     panel->Show();
   else
     panel->ShowInactive();
   MessageLoopForUI::current()->RunAllPending();
@@ skipping 41 matching lines @@
   std::string error;
   scoped_refptr<Extension> extension = Extension::Create(
       full_path,  location, *input_value,
       Extension::STRICT_ERROR_CHECKS, &error);
   EXPECT_TRUE(extension.get());
   EXPECT_STREQ("", error.c_str());
   browser()->GetProfile()->GetExtensionService()->OnLoadSingleExtension(
       extension.get(), false);
   return extension;
 }