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

chrome/browser/extensions/window_open_apitest.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 "base/command_line.h"
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/test/base/ui_test_utils.h"
@@ skipping 124 matching lines @@
     "files/extensions/api_test/window_open/popup_blocking/hosted_app/");
 
   GURL open_tab =
       test_server()->GetURL(popup_app_contents_path + "open_tab.html")
           .ReplaceComponents(replace_host);
   GURL open_popup =
       test_server()->GetURL(popup_app_contents_path + "open_popup.html")
           .ReplaceComponents(replace_host);
 
   browser()->OpenURL(open_tab, GURL(), NEW_FOREGROUND_TAB,
-                     PageTransition::TYPED);
+                     content::PAGE_TRANSITION_TYPED);
   browser()->OpenURL(open_popup, GURL(), NEW_FOREGROUND_TAB,
-                     PageTransition::TYPED);
+                     content::PAGE_TRANSITION_TYPED);
 
   WaitForTabsAndPopups(browser(), 3, 1);
 }
 
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, WindowArgumentsOverflow) {
   ASSERT_TRUE(RunExtensionTest("window_open/argument_overflow")) << message_;
 }
 
 class WindowOpenPanelTest : public ExtensionApiTest {
   virtual void SetUpCommandLine(CommandLine* command_line) {
@@ skipping 10 matching lines @@
 #if defined(OS_MACOSX) || defined(OS_WIN)
 // Focus test fails if there is no window manager on Linux.
 IN_PROC_BROWSER_TEST_F(WindowOpenPanelTest, WindowOpenFocus) {
   ASSERT_TRUE(RunExtensionTest("window_open/focus")) << message_;
 }
 #endif
 
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, WindowOpener) {
   ASSERT_TRUE(RunExtensionTest("window_open/opener")) << message_;
 }