Follow-on fixes and naming changes for https://codereview.chromium.org/12086077/

BUG=172573
Review URL: https://codereview.chromium.org/12177018

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@180600 0039d316-1c4b-4281-b951-d872f2087c98
  ResourceContext* GetResourceContext() {
    return shell()->web_contents()->GetBrowserContext()->GetResourceContext();
  }

  ResourceContext* GetResourceContext() {
    return shell()->web_contents()->GetBrowserContext()->GetResourceContext();
  }
