LayoutTests: Added missing arguments for gestureScrollEnd.

BUG=415970

Review URL: https://codereview.chromium.org/603593002

git-svn-id: svn://svn.chromium.org/blink/trunk@182609 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Move color/gradient/pattern out of StrokeData

The "other methods" referred to in the documentation of StrokeData, only
use the stroke information that pertain to the "geometry" of the stroke.
This means that m_color/m_gradient/m_pattern are dead weight except for
the use in GraphicsContextState. Move those fields to GCS for better
separation of "geometry" and "ink".

Review URL: https://codereview.chromium.org/597053003

git-svn-id: svn://svn.chromium.org/blink/trunk@182610 bbb929c8-8fbe-4397-9dbb-9b2b20218538