Revert of Make "priv" classes for GrTexure and GrSurface.

Revert of Make "priv" classes for GrTexure and GrSurface. (patchset #9 id:260001 of https://codereview.chromium.org/596053002/)

Reason for revert:
Breaking the Chrome builds with:

 lib/libcc.so: error: undefined reference to 'GrAutoScratchTexture::detach()'

(http://108.170.220.120:10117/builders/Canary-Chrome-Ubuntu13.10-Ninja-x86_64-DRT/builds/2990/steps/Retry_BuildContentShell_1/logs/stdio)

Original issue's description:
> Make "priv" classes for GrTexure and GrSurface.

TBR=egdaniel@google.com,joshualitt@google.com,bsalomon@google.com
NOTREECHECKS=true
NOTRY=true

Committed: https://skia.googlesource.com/skia/+/b06e5a2f558133b865cb0c3cc0b36e9bd2e594e2

[robertphillips, 2014-09-30 13:57:11]

Created Revert of Make "priv" classes for GrTexure and GrSurface.

[commit-bot: I haz the power, 2014-09-30 13:58:05]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/618733002/1

[commit-bot: I haz the power, 2014-09-30 13:58:24]

Committed patchset #1 (id:1) as b06e5a2f558133b865cb0c3cc0b36e9bd2e594e2

[bsalomon, 2014-09-30 14:31:39]

On 2014/09/30 13:58:24, I haz the power (commit-bot) wrote:
> Committed patchset #1 (id:1) as b06e5a2f558133b865cb0c3cc0b36e9bd2e594e2

I think the bots just need a clean. The functions is defined in GrContext.cpp. I
suspect this is a build system issue.

[robertphillips, 2014-09-30 14:56:46]

Here is one of the effected DEPS rolls:
https://codereview.chromium.org/619643002/

[bsalomon, 2014-09-30 15:00:25]

On 2014/09/30 14:56:46, robertphillips wrote:
> Here is one of the effected DEPS rolls:
> https://codereview.chromium.org/619643002/

I bet it's a .so issue. AST probably needs to be marked SK_API.

[robertphillips, 2014-09-30 15:02:16]

Note that (GrResourceCache2 manages scratch texture -
https://codereview.chromium.org/608883003) magically fixed the compilation issue
but seemed to have some other mystery issues (on Ubuntu and Android)

[bsalomon, 2014-09-30 15:04:18]

On 2014/09/30 15:02:16, robertphillips wrote:
> Note that (GrResourceCache2 manages scratch texture -
> https://codereview.chromium.org/608883003) magically fixed the compilation
issue
> but seemed to have some other mystery issues (on Ubuntu and Android)

Yup, that change moved the detach defn back to the header.