DevTools: Generate correct id for a remote target

BUG=338303

Review URL: https://codereview.chromium.org/144303005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247949 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 247949
Remove unused EnableAdviewSrcAttribute.

BUG=315414
TEST=affected tests removed

Review URL: https://codereview.chromium.org/147663002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247950 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 247950