Make some field trials unforceable via command-line in the official build.

BUG=342585
TEST=Remove the OFFICIAL_BUILD ifdefs and:
1) Confirm that running with --force-fieldtrials with an unforceable experiment and a forceable one only forces the forceable one.
2) Confirm that the value which couldn't be forced in the browser also makes it unforced in the renderer.

Put the OFFICIAL_BUILD ifdefs back and confirm that unforceable experiments are still forceable in non-official builds.

Review URL: https://codereview.chromium.org/153913009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@250988 0039d316-1c4b-4281-b951-d872f2087c98
Roll DEPS for tools/gyp to 1852

r1852: (sdefresne) Fix generation for ninja of multiarch executable targets
r1851: (sdefresne) Use "formats" parameter to TestGyp to filter the format
r1850: (sdefresne) Improve ninja's Xcode emulation
r1849: (sdefresne) Extract XcodeVersion to be a standalone module function
r1848: (sdefresne) Fix comparison of Xcode version
r1847: (scottmg) Ninja generator: check if meminfo exists before reading it.

BUG=314720
R=blundell

Review URL: https://codereview.chromium.org/148903003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@250989 0039d316-1c4b-4281-b951-d872f2087c98
Password manager: Add myself and vabr@ to OWNERS.

BUG=None
R=gcasto@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/153243003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@250990 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@250991 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 250991