Add string art GM and sample.

Add string art GM and sample.

BUG=279014
R=robertphillips@google.com

Committed: https://code.google.com/p/skia/source/detail?r=11383

[robertphillips, 2013-09-12 15:19:56]

lgtm + nits/questions

https://codereview.chromium.org/23609037/diff/1/gm/stringart.cpp
File gm/stringart.cpp (right):

https://codereview.chromium.org/23609037/diff/1/gm/stringart.cpp#newcode13
gm/stringart.cpp:13: 
Does it need to be this big?

https://codereview.chromium.org/23609037/diff/1/gm/stringart.cpp#newcode17
gm/stringart.cpp:17: 
// description?

https://codereview.chromium.org/23609037/diff/1/gm/stringart.cpp#newcode31
gm/stringart.cpp:31: virtual void onDraw(SkCanvas* canvas) {
There is also SkScalarHalf()

https://codereview.chromium.org/23609037/diff/1/samplecode/SampleStringArt.cpp
File samplecode/SampleStringArt.cpp (right):

https://codereview.chromium.org/23609037/diff/1/samplecode/SampleStringArt.cp...
samplecode/SampleStringArt.cpp:9: 
// comment?

https://codereview.chromium.org/23609037/diff/1/samplecode/SampleStringArt.cp...
samplecode/SampleStringArt.cpp:26: 
this->width()?
this->height()?

[jvanverth1, 2013-09-12 16:55:44]

https://codereview.chromium.org/23609037/diff/1/gm/stringart.cpp
File gm/stringart.cpp (right):

https://codereview.chromium.org/23609037/diff/1/gm/stringart.cpp#newcode13
gm/stringart.cpp:13: 
On 2013/09/12 15:19:56, robertphillips wrote:
> Does it need to be this big?

Done.

https://codereview.chromium.org/23609037/diff/1/gm/stringart.cpp#newcode17
gm/stringart.cpp:17: 
On 2013/09/12 15:19:56, robertphillips wrote:
> // description?

Done.

https://codereview.chromium.org/23609037/diff/1/gm/stringart.cpp#newcode31
gm/stringart.cpp:31: virtual void onDraw(SkCanvas* canvas) {
On 2013/09/12 15:19:56, robertphillips wrote:
> There is also SkScalarHalf()

Done.

https://codereview.chromium.org/23609037/diff/1/samplecode/SampleStringArt.cpp
File samplecode/SampleStringArt.cpp (right):

https://codereview.chromium.org/23609037/diff/1/samplecode/SampleStringArt.cp...
samplecode/SampleStringArt.cpp:9: 
On 2013/09/12 15:19:56, robertphillips wrote:
> // comment?

Done.

https://codereview.chromium.org/23609037/diff/1/samplecode/SampleStringArt.cp...
samplecode/SampleStringArt.cpp:26: 
On 2013/09/12 15:19:56, robertphillips wrote:
> this->width()?
> this->height()?

Done.

[jvanverth1, 2013-09-19 15:32:58]

Committed patchset #2 manually as r11383 (presubmit successful).