Switch to the new SkCanvas::willSave() API.
Skia's save() SaveFlags bits are deprecated. At this
point all callers have been updated to always pass kMatrixClip, but
SkCanvas subclasses also need to use the new willSave() API.
(depends on https://codereview.chromium.org/
338833003/ rolling)
BUG=skia:2297
R=piman@chromium.org, reed@google.com, robertphillips@google.com
Review URL: https://codereview.chromium.org/
337163003
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@278363 0039d316-1c4b-4281-b951-d872f2087c98