chromium-browser: various fixes from internal audits

The PageCaptureSaveAsMHTMLFunction::ReturnFailure function in browser/extensions/api/pagecapture/pagecaptureapi.cc in Google Chrome before 49.0.2623.108 allows attackers to cause a denial of service or possibly have unspecified other impact by triggering an error in creating an MHTML document...

UBUNTU-CVE-2016-1650

The PageCaptureSaveAsMHTMLFunction::ReturnFailure function in browser/extensions/api/pagecapture/pagecaptureapi.cc in Google Chrome before 49.0.2623.108 allows attackers to cause a denial of service or possibly have unspecified other impact by triggering an error in creating an MHTML document...