Have the Debugger extension api check that it has access to the tab

Check PermissionsData::CanAccessTab() prior to attaching the debugger.

BUG=367567

Review URL: https://codereview.chromium.org/352523003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@280354 0039d316-1c4b-4281-b951-d872f2087c98
  bool BlockedScript(const Extension* extension, const GURL& url,
                     const GURL& top_url) {
    return !extension->permissions_data()->CanAccessPage(
        extension, url, top_url, -1, -1, NULL);
  }

  bool BlockedScript(const Extension* extension, const GURL& url,
                     const GURL& top_url) {
    return !extension->permissions_data()->CanAccessPage(
        extension, url, top_url, -1, -1, NULL);
  }
