Remove public_headers.gypi, unneeded by Skia.

Remove public_headers.gypi, unneeded by Skia.

This file not needed by Skia, and is almost always out of date.
We recommend generating this inside Android WebView, where it is
used. Generating it is relatively straightforward; here is one way:
https://codereview.chromium.org/198063002/diff/110001/platform_tools/android/gyp_gen/gen_public_headers.py

BUG=skia:2350
Committed: https://skia.googlesource.com/skia/+/a3fce46f7c85eb3eb5c5373c1eaa0336d9756252

[scroggo, 2014-07-10 18:07:56]

On 2014/07/09 14:40:03, scroggo wrote:

Robert,

Can you give me an LGTM? This does what we agreed upon in the bug.

[robertphillips, 2014-07-10 18:14:23]

lgtm

[scroggo, 2014-07-10 18:15:58]

The CQ bit was checked by scroggo@google.com

[commit-bot: I haz the power, 2014-07-10 18:16:58]

CQ is trying da patch. Follow status at
 https://skia-tree-status.appspot.com/cq/scroggo@google.com/381633003/1

[scroggo, 2014-07-10 22:25:25]

The CQ bit was checked by scroggo@google.com

[commit-bot: I haz the power, 2014-07-10 22:25:30]

CQ is trying da patch. Follow status at
 https://skia-tree-status.appspot.com/cq/scroggo@google.com/381633003/20001

[commit-bot: I haz the power, 2014-07-11 15:47:21]

Change committed as a3fce46f7c85eb3eb5c5373c1eaa0336d9756252

[scroggo, 2014-07-11 16:04:57]

A revert of this CL has been created in
https://codereview.chromium.org/382153007/ by scroggo@google.com.

The reason for reverting is: Breaking canary:
http://108.170.220.120:10117/builders/Canary-Chrome-Ubuntu13.10-Ninja-x86_64-...

.