NaCl cleanup: Move ppb_nacl_private.h into components/nacl/renderer/

NaCl cleanup: Move ppb_nacl_private.h into components/nacl/renderer/

Since PPB_NaCl_Private is both implemented and consumed in
components/nacl/renderer/, there's no need for the interface to be
defined in ppapi/.  The fact that this is a PPAPI interface at all is
just a holdover from when the code for the NaCl trusted plugin lived
outside the Chromium repo.

We can drop the ppb_nacl_private.idl file.

Benefits:

 * This reduces the friction for changing ppb_nacl_private.h.  It's no
   longer necessary to change ppb_nacl_private.idl and re-run the
   generator.

 * This removes PPB_NaCl_Private from the PPAPI shims, reducing code
   size.

 * ppb_nacl_private.h no longer has to follow the PPAPI C header
   style.  For example, it would no longer need to define its own
   "struct PP_NaClFileInfo" type -- it could share a definition that's
   marshallable over Chrome IPC.

Changes to ppb_nacl_private.h:

 * Add comment to explain the status of this interface.
 * Remove unused "*_1_0" variants of #define and typedef.

BUG=239656
BUG=251460
TEST=trybots

Committed: https://crrev.com/3cf62d9ade1564df31b3887b01df5afad745a124
Cr-Commit-Position: refs/heads/master@{#315641}

[Mark Seaborn, 2015-02-10 18:11:00]

mseaborn@chromium.org changed reviewers:
+ dmichael@chromium.org, teravest@chromium.org

[dmichael (off chromium), 2015-02-10 18:20:14]

lgtm

[teravest, 2015-02-10 18:23:01]

lgtm

[Mark Seaborn, 2015-02-10 18:29:56]

The CQ bit was checked by mseaborn@chromium.org

[commit-bot: I haz the power, 2015-02-10 18:31:23]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/911463003/40001

[Mark Seaborn, 2015-02-10 18:36:34]

mseaborn@chromium.org changed reviewers:
+ jamescook@chromium.org, thakis@chromium.org

[Mark Seaborn, 2015-02-10 18:36:49]

+thakis for chrome/renderer/
+jamescook for extensions/shell/

[commit-bot: I haz the power, 2015-02-10 18:37:20]

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

[commit-bot: I haz the power, 2015-02-10 18:37:21]

Try jobs failed on following builders:
  chromium_presubmit on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)

[James Cook, 2015-02-10 19:55:10]

extensions/shell LGTM

[Nico, 2015-02-10 20:35:55]

chrome/renderer lgtm

[Mark Seaborn, 2015-02-10 20:36:37]

The CQ bit was checked by mseaborn@chromium.org

[commit-bot: I haz the power, 2015-02-10 20:36:55]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/911463003/40001

[commit-bot: I haz the power, 2015-02-10 21:20:11]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2015-02-10 21:20:40]

Patchset 3 (id:??) landed as
https://crrev.com/3cf62d9ade1564df31b3887b01df5afad745a124
Cr-Commit-Position: refs/heads/master@{#315641}