Refactor SkShader::hasLocalMatrix() caller.

Update GraphicsContextRecorder::objectForSkShader() to avoid calling
deprecated hasLocalMatrix().

R=reed@google.com, senorblanco@chromium.org
TBR=senorblanco@chromium.org

Review URL: https://codereview.chromium.org/296513018

git-svn-id: svn://svn.chromium.org/blink/trunk@174584 bbb929c8-8fbe-4397-9dbb-9b2b20218538