Prepare for internal SaveFlags removal.

Prepare for internal SaveFlags removal.

Chromium has a couple of SkCanvas subclasses which override willSave().
This adds a transitional shim to facilitate converting these to the
parameter-less API.

BUG=skia:2297
R=reed@google.com,scroggo@google.com

Committed: https://skia.googlesource.com/skia/+/07fc662d7ee018bfc9eeddab82cc1768f57a69d2

[f(malita), 2014-06-16 17:58:11]

Re-upload of https://codereview.chromium.org/338833003/ to fix the base URL.

[scroggo, 2014-06-16 18:34:29]

On 2014/06/16 17:58:11, Florin Malita wrote:
> Re-upload of https://codereview.chromium.org/338833003/ to fix the base URL.

lgtm

[reed1, 2014-06-16 18:38:11]

won't get a warning about shadowing a virtual with two variants?

lgtm

[f(malita), 2014-06-16 18:39:43]

On 2014/06/16 18:38:11, reed1 wrote:
> won't get a warning about shadowing a virtual with two variants?

Haven't noticed it on my local clang build, but I'll fire all platform trybots
to make sure.

[f(malita), 2014-06-16 18:58:28]

The CQ bit was checked by fmalita@chromium.org

[commit-bot: I haz the power, 2014-06-16 18:58:58]

CQ is trying da patch. Follow status at
 https://skia-tree-status.appspot.com/cq/fmalita@chromium.org/338913002/1

[commit-bot: I haz the power, 2014-06-16 19:13:44]

Change committed as 07fc662d7ee018bfc9eeddab82cc1768f57a69d2

[f(malita), 2014-06-17 19:51:43]

On 2014/06/16 18:39:43, Florin Malita wrote:
> On 2014/06/16 18:38:11, reed1 wrote:
> > won't get a warning about shadowing a virtual with two variants?
> 
> Haven't noticed it on my local clang build, but I'll fire all platform trybots
> to make sure.

Arrr, I see now what you're talking about :( This doesn't trigger warnings in
Skia, but it creates a visibility mess for clients due to subclasses overriding
only one of them.