Revert of add peekPixels to SkCanvas and SkSurface

Revert of add peekPixels to SkCanvas and SkSurface (https://codereview.chromium.org/161733002/)

Reason for revert:
compile issues with gm/xfermodes3

Original issue's description:
> add peekPixels to SkCanvas and SkSurface
> 
> clone of https://codereview.chromium.org/159723006/
> 
> Committed: https://code.google.com/p/skia/source/detail?r=13427

TBR=
NOTREECHECKS=true
NOTRY=true

Committed: http://code.google.com/p/skia/source/detail?r=13428

[reed2, 2014-02-13 15:21:39]

Created Revert of add peekPixels to SkCanvas and SkSurface

[commit-bot: I haz the power, 2014-02-13 15:21:51]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-02-13 15:21:51]

No LGTM from a valid reviewer yet. Only full committers are accepted.
Even if an LGTM may have been provided, it was from a non-committer or
a lowly provisional committer, _not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[jvanverth1, 2014-02-13 15:25:24]

On 2014/02/13 15:21:51, I haz the power (commit-bot) wrote:
> No LGTM from a valid reviewer yet. Only full committers are accepted.
> Even if an LGTM may have been provided, it was from a non-committer or
> a lowly provisional committer, _not_ a full super star committer.
> See http://www.chromium.org/getting-involved/become-a-committer
> Note that this has nothing to do with OWNERS files.

LGTM

[jvanverth1, 2014-02-13 15:28:29]

The CQ bit was checked by jvanverth@google.com

[commit-bot: I haz the power, 2014-02-13 15:28:34]

CQ is trying da patch. Follow status at
https://skia-tree-status.appspot.com/cq/reed@chromium.org/163823002/1

[commit-bot: I haz the power, 2014-02-13 15:29:16]

Change committed as 13428