Simplify VTTParser::collectTimeStamp

Drop the various "is next character and ASCII digit" test that precede
calls to collectDigitsToInt. The latter will perform both the
"out of input" and "is ASCII digit" checks via collectDigits.

BUG=305317

Review URL: https://codereview.chromium.org/104443002

git-svn-id: svn://svn.chromium.org/blink/trunk@163174 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Revert of https://codereview.chromium.org/98443004/
Reason for revert: WTF_PartitionAlloc.MappingCollision failing on windows

TBR=tsepez@chromium.org,cevans@chromium.org
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/94013003

git-svn-id: svn://svn.chromium.org/blink/trunk@163175 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Use the gyp variable angle_path to include ANGLE.

Required for migrating chrome and blink to the new angle repository.

BUG=319527

Review URL: https://codereview.chromium.org/101933005

git-svn-id: svn://svn.chromium.org/blink/trunk@163176 bbb929c8-8fbe-4397-9dbb-9b2b20218538