Fixes in UserGestureIndicator

This CL fixes problems discovered in https://codereview.chromium.org/235983016/ post landing.

BUG=163072

Review URL: https://codereview.chromium.org/239963005

git-svn-id: svn://svn.chromium.org/blink/trunk@172128 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Auto-rebaseline for r172126

http://src.chromium.org/viewvc/blink?view=revision&revision=172126

BUG=231577
TBR=ed@opera.com

Review URL: https://codereview.chromium.org/246303003

git-svn-id: svn://svn.chromium.org/blink/trunk@172129 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: Check duplicate sources in dependency trees when compiling frontend

Drive-by: Use os.path.join() instead of manual string concatenation

R=vsevik
NOTRY=true

Review URL: https://codereview.chromium.org/247203002

git-svn-id: svn://svn.chromium.org/blink/trunk@172130 bbb929c8-8fbe-4397-9dbb-9b2b20218538