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

chrome/browser/browser_commands_unittest.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/app/chrome_command_ids.h"
 #include "chrome/browser/bookmarks/bookmark_model.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/test/base/browser_with_test_window_test.h"
 #include "chrome/test/base/testing_profile.h"
@@ skipping 68 matching lines @@
 }
 
 TEST_F(BrowserCommandsTest, BookmarkCurrentPage) {
   // We use profile() here, since it's a TestingProfile.
   profile()->CreateBookmarkModel(true);
   profile()->BlockUntilBookmarkModelLoaded();
 
   // Navigate to a url.
   GURL url1("http://foo/1");
   AddTab(browser(), url1);
-  browser()->OpenURL(url1, GURL(), CURRENT_TAB, PageTransition::TYPED);
+  browser()->OpenURL(url1, GURL(), CURRENT_TAB, content::PAGE_TRANSITION_TYPED);
 
   // TODO(beng): remove this once we can use TabContentses directly in testing
   //             instead of the TestTabContents which causes this command not to
   //             be enabled when the tab is added (and selected).
   browser()->command_updater()->UpdateCommandEnabled(IDC_BOOKMARK_PAGE, true);
 
   // Star it.
   browser()->ExecuteCommand(IDC_BOOKMARK_PAGE);
 
   // It should now be bookmarked in the bookmark model.
@@ skipping 86 matching lines @@
 
   // Pressing it a second time while the NTP is open shouldn't change anything.
   browser()->Search();
   ASSERT_EQ(2, browser()->tab_count());
   ASSERT_EQ(1, browser()->active_index());
   current_url = browser()->GetSelectedTabContents()->GetURL();
   EXPECT_TRUE(current_url.SchemeIs(chrome::kChromeUIScheme));
   EXPECT_EQ(chrome::kChromeUINewTabHost, current_url.host());
 }
 #endif