Demote getCount, getDepth, and clear to RTree-only methods.

Demote getCount, getDepth, and clear to RTree-only methods.

We use them only to test RTree.

BUG=skia:

Committed: https://skia.googlesource.com/skia/+/8f8c25eabb97da8eda488895f04f2d12cb5ea4cf

[mtklein, 2014-10-02 15:56:47]

The CQ bit was checked by mtklein@google.com

[mtklein, 2014-10-02 15:56:54]

mtklein@google.com changed reviewers:
+ robertphillips@google.com

[commit-bot: I haz the power, 2014-10-02 15:57:16]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/622773003/1

[commit-bot: I haz the power, 2014-10-02 15:57:17]

Note for Reviewers:
The CQ is waiting for an approval.
If you believe that the CL is not ready yet, or if you would like to L-G-T-M
with comments then please uncheck the CQ checkbox.

Waiting for LGTM from a valid reviewer till 2014-10-02 21:57 UTC

[mtklein, 2014-10-02 15:59:41]

The CQ bit was checked by mtklein@google.com

[commit-bot: I haz the power, 2014-10-02 16:00:16]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/622773003/20001

[commit-bot: I haz the power, 2014-10-02 16:00:16]

Note for Reviewers:
The CQ is waiting for an approval.
If you believe that the CL is not ready yet, or if you would like to L-G-T-M
with comments then please uncheck the CQ checkbox.

Waiting for LGTM from a valid reviewer till 2014-10-02 22:00 UTC

[mtklein, 2014-10-02 16:00:58]

The CQ bit was checked by mtklein@google.com

[commit-bot: I haz the power, 2014-10-02 16:01:07]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/622773003/40001

[commit-bot: I haz the power, 2014-10-02 16:01:08]

Note for Reviewers:
The CQ is waiting for an approval.
If you believe that the CL is not ready yet, or if you would like to L-G-T-M
with comments then please uncheck the CQ checkbox.

Waiting for LGTM from a valid reviewer till 2014-10-02 22:01 UTC

[robertphillips, 2014-10-02 16:07:34]

The CQ bit was unchecked by robertphillips@google.com

[robertphillips, 2014-10-02 16:07:58]

lgtm + dox suggestion

https://codereview.chromium.org/622773003/diff/1/src/core/SkRTree.h
File src/core/SkRTree.h (right):

https://codereview.chromium.org/622773003/diff/1/src/core/SkRTree.h#newcode81
src/core/SkRTree.h:81: 
keep the comments?

[mtklein, 2014-10-02 16:14:40]

https://codereview.chromium.org/622773003/diff/1/src/core/SkRTree.h
File src/core/SkRTree.h (right):

https://codereview.chromium.org/622773003/diff/1/src/core/SkRTree.h#newcode81
src/core/SkRTree.h:81: 
On 2014/10/02 16:07:58, robertphillips wrote:
> keep the comments?

Done.

[mtklein, 2014-10-02 16:14:52]

The CQ bit was checked by mtklein@google.com

[commit-bot: I haz the power, 2014-10-02 16:15:37]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/622773003/60001

[commit-bot: I haz the power, 2014-10-02 16:53:09]

Committed patchset #4 (id:60001) as 8f8c25eabb97da8eda488895f04f2d12cb5ea4cf