The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/812a97d083eef76745dc7469f9cc4ca4f2ed2881

commit 812a97d083eef76745dc7469f9cc4ca4f2ed2881
Author: lpz <lpz@chromium.org>
Date: Mon Mar 20 20:06:17 2017

Change some ints to size_t to fix warning on win64 builds

BUG= 702773 

Review-Url: https://codereview.chromium.org/2760803003
Cr-Commit-Position: refs/heads/master@{#458156}

[modify] https://crrev.com/812a97d083eef76745dc7469f9cc4ca4f2ed2881/chrome/renderer/safe_browsing/threat_dom_details.cc

hmm looks like still errors:
FAILED: obj/components/safe_browsing/renderer/renderer/threat_dom_details.obj 
ninja -t msvc -e environment.x64 -- E:\b\c\goma_client/gomacc.exe "E:\b\depot_tools\win_toolchain\vs_files\d3cb0e37bdd120ad0ac4650b674b09e81be45616\VC\bin\amd64/cl.exe" /nologo /showIncludes /FC @obj/components/safe_browsing/renderer/renderer/threat_dom_details.obj.rsp /c ../../components/safe_browsing/renderer/threat_dom_details.cc /Foobj/components/safe_browsing/renderer/renderer/threat_dom_details.obj /Fd"obj/components/safe_browsing/renderer/renderer_cc.pdb"
e:\b\c\b\win\src\components\safe_browsing\renderer\threat_dom_details.cc(112): error C2220: warning treated as error - no 'object' file generated
e:\b\c\b\win\src\components\safe_browsing\renderer\threat_dom_details.cc(112): warning C4267: 'initializing': conversion from 'size_t' to 'int', possible loss of data
e:\b\c\b\win\src\components\safe_browsing\renderer\threat_dom_details.cc(175): warning C4267: '=': conversion from 'size_t' to 'int', possible loss of data
e:\b\c\b\win\src\components\safe_browsing\renderer\threat_dom_details.cc(183): warning C4267: 'argument': conversion from 'size_t' to 'const int', possible loss of data

link:
https://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_rel_ng/builds/388177

FYI patch I am trying to land: https://codereview.chromium.org/2764883002/

Ahh, thanks for the CL, will help to reproduce this.

Tim: would you mind taking a quick look at https://codereview.chromium.org/2770493004/#
I think it should resolve this.
Thanks.

yes thanks, just lgtm'ed it )

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/ac4f2ee6eef06c8c345eed0a01bf64ab3df642eb

commit ac4f2ee6eef06c8c345eed0a01bf64ab3df642eb
Author: lpz <lpz@chromium.org>
Date: Fri Mar 24 15:09:00 2017

Remove disable warnings compile flag in safebrowsing component, and fix some type win64 type errors that were found.

BUG= 700351 , 702773 

Review-Url: https://codereview.chromium.org/2770493004
Cr-Commit-Position: refs/heads/master@{#459425}

[modify] https://crrev.com/ac4f2ee6eef06c8c345eed0a01bf64ab3df642eb/components/safe_browsing/renderer/BUILD.gn
[modify] https://crrev.com/ac4f2ee6eef06c8c345eed0a01bf64ab3df642eb/components/safe_browsing/renderer/threat_dom_details.cc