Rename GrBitmapTextContextB to GrAtlasTextContext

Rename GrBitmapTextContextB to GrAtlasTextContext

BUG=skia:

Committed: https://skia.googlesource.com/skia/+/dbd3593e0b0cfb04f23b9d7bce623e6e32364b3f

[joshualitt, 2015-04-01 18:20:20]

joshualitt@google.com changed reviewers:
+ bsalomon@google.com, joshualitt@google.com, jvanverth@google.com

[joshualitt, 2015-04-01 18:20:20]

A simple rename of GrBitmapTextContextB, no logic changes.

[jvanverth1, 2015-04-01 18:48:36]

lgtm

[joshualitt, 2015-04-01 19:46:33]

The CQ bit was checked by joshualitt@google.com

[commit-bot: I haz the power, 2015-04-01 19:46:46]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1050173002/1

[commit-bot: I haz the power, 2015-04-01 19:46:51]

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

[commit-bot: I haz the power, 2015-04-01 19:46:52]

Presubmit check for 1050173002-1 failed and returned exit status 1.

Running presubmit commit checks ...

** Presubmit ERRORS **
Since the CL is editing public API, you must have an LGTM from one of:
('reed@chromium.org', 'reed@google.com', 'bsalomon@chromium.org',
'bsalomon@google.com', 'djsollen@chromium.org', 'djsollen@google.com')

[joshualitt, 2015-04-01 19:47:19]

On 2015/04/01 19:46:52, I haz the power (commit-bot) wrote:
> Presubmit check for 1050173002-1 failed and returned exit status 1.
> 
> Running presubmit commit checks ...
> 
> ** Presubmit ERRORS **
> Since the CL is editing public API, you must have an LGTM from one of:
> (mailto:, mailto:, mailto:,
> mailto:, mailto:, mailto:)

Brian, can you rubber stamp this?

[bsalomon, 2015-04-02 16:06:53]

On 2015/04/01 19:47:19, joshualitt wrote:
> On 2015/04/01 19:46:52, I haz the power (commit-bot) wrote:
> > Presubmit check for 1050173002-1 failed and returned exit status 1.
> > 
> > Running presubmit commit checks ...
> > 
> > ** Presubmit ERRORS **
> > Since the CL is editing public API, you must have an LGTM from one of:
> > (mailto:, mailto:, mailto:,
> > mailto:, mailto:, mailto:)
> 
> Brian, can you rubber stamp this?

lgtm

[joshualitt, 2015-04-02 16:09:44]

The CQ bit was checked by joshualitt@google.com

[commit-bot: I haz the power, 2015-04-02 16:10:13]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1050173002/1

[commit-bot: I haz the power, 2015-04-02 16:19:11]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/dbd3593e0b0cfb04f23b9d7bce623e6e32364b3f