This update to Chromium 63.0.3239.84 fixes the following security issues:

- CVE-2017-15408: Heap buffer overflow in PDFium
- CVE-2017-15409: Out of bounds write in Skia
- CVE-2017-15410: Use after free in PDFium
- CVE-2017-15411: Use after free in PDFium
- CVE-2017-15412: Use after free in libXML
- CVE-2017-15413: Type confusion in WebAssembly
- CVE-2017-15415: Pointer information disclosure in IPC call
- CVE-2017-15416: Out of bounds read in Blink
- CVE-2017-15417: Cross origin information disclosure in Skia
- CVE-2017-15418: Use of uninitialized value in Skia
- CVE-2017-15419: Cross origin leak of redirect URL in Blink
- CVE-2017-15420: URL spoofing in Omnibox
- CVE-2017-15422: Integer overflow in ICU
- CVE-2017-15423: Issue with SPAKE implementation in BoringSSL
- CVE-2017-15424: URL Spoof in Omnibox
- CVE-2017-15425: URL Spoof in Omnibox
- CVE-2017-15426: URL Spoof in Omnibox
- CVE-2017-15427: Insufficient blocking of JavaScript in Omnibox