Add functions for inspecting SkShader.

Add functions for inspecting SkShader.

Add a function to inspect an SkShader to determine if it is an
SkComposeShader.

Add a virtual function for determining if an SkShader is a custom
shader, which returns a custom set of information. The
implementation is in Android, and this function is only defined
if SK_BUILD_FOR_ANDROID_FRAMEWORK.

BUG=b/10650594

[reed1, 2014-05-07 22:35:36]

lgtm

https://codereview.chromium.org/272503011/diff/1/include/core/SkShader.h
File include/core/SkShader.h (right):

https://codereview.chromium.org/272503011/diff/1/include/core/SkShader.h#newc...
include/core/SkShader.h:368: virtual bool asACompose(ComposeRec* rec) const {
return false; }
you and your implementations inline for virtual methods...

[scroggo, 2014-05-07 22:53:11]

https://codereview.chromium.org/272503011/diff/1/include/core/SkShader.h
File include/core/SkShader.h (right):

https://codereview.chromium.org/272503011/diff/1/include/core/SkShader.h#newc...
include/core/SkShader.h:368: virtual bool asACompose(ComposeRec* rec) const {
return false; }
On 2014/05/07 22:35:37, reed1 wrote:
> you and your implementations inline for virtual methods...

It saves typing!

[djsollen, 2014-05-13 15:52:17]

The CQ bit was checked by djsollen@google.com

[commit-bot: I haz the power, 2014-05-13 15:52:33]

CQ is trying da patch. Follow status at
 https://skia-tree-status.appspot.com/cq/scroggo@google.com/272503011/20001

[djsollen, 2014-05-13 17:16:22]

uploaded a new CL that is a rebase of this one since I can't add a new patch set
to this issue.

https://codereview.chromium.org/282733005/