[MemSheriff] Suppress false positives caused by V8

NOTRY=true
BUG=328552
TBR=earthdok@chromium.org

Review URL: https://codereview.chromium.org/115143005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@241693 0039d316-1c4b-4281-b951-d872f2087c98
Remove --reduce-gpu-sandbox command-line flag.

The sandbox is always set to a reduced level nowadays, so the command-line flag does nothing.

BUG=

Review URL: https://codereview.chromium.org/118553002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@241694 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 241693
SVN changes up to revision 241694
Mojo: More data pipe testing.

Test waiting quite thoroughly.

R=sky@chromium.org

Review URL: https://codereview.chromium.org/108193016

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@241695 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 241695