Add WorkerDocumentSet::ContainsExternalRenderer(int worker_process_id)

It will be called to checks to see if the document set contains any documents which is associated with other renderer process than worker_process_id.

BUG=327256

Review URL: https://codereview.chromium.org/178473016

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@254928 0039d316-1c4b-4281-b951-d872f2087c98
Add UI hook for distilling web pages for test shell.

This adds the Java hooks needed and a menu option to distill the current
web page in the test shell.

BUG=319881
NOTRY=true

Review URL: https://codereview.chromium.org/185113002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@254929 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 254928
Widen suppression for 349152

BUG=349153
TBR=xians@chromium.org

Review URL: https://codereview.chromium.org/187283004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@254930 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 254930