Implement the Extension History API, v 0.1.The first version is a weak wrapper around the HistoryServices object in Chrome.BUG=22952TEST=browser_tests.exe --gtest_filer=ExtensionApiTest.History
Review URL: http://codereview.chromium.org/313001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@30561 0039d316-1c4b-4281-b951-d872f2087c98