Remove GTalk Pepper interfaces and related code.

Remove GTalk Pepper interfaces and related code.

Remove obsolete private Pepper interface private/ppb_talk_private.h,
associated Pepper plumbing code, strings, and chrome::PepperTalkHost.

These are no longer needed as support for Pepper GTalk has been
dropped.

BUG=392002
TEST=browser_tests

Committed: https://crrev.com/c2c781c51f26ae067110d8c82aa7c26643649611
Cr-Commit-Position: refs/heads/master@{#325310}

[Josh Horwich, 2015-04-15 18:28:43]

jhorwich@chromium.org changed reviewers:
+ bbudge@chromium.org, jam@chromium.org, jschuh@chromium.org

[jam, 2015-04-15 19:42:31]

content&chrome lgtm

[bbudge, 2015-04-15 20:53:00]

Pepper LGTM

https://codereview.chromium.org/1088183003/diff/20001/ppapi/ppapi_proxy.gypi
File ppapi/ppapi_proxy.gypi (left):

https://codereview.chromium.org/1088183003/diff/20001/ppapi/ppapi_proxy.gypi#...
ppapi/ppapi_proxy.gypi:292: 'proxy/ppb_talk_private_proxy.cc',
I guess this file doesn't exist, and gyp doesn't complain about excluding it.

[Josh Horwich, 2015-04-15 21:10:49]

jschuh@ ptal ppapi/proxy/ppapi_messages.h - FYI, I'm simply removing now-unused
messages here.

https://codereview.chromium.org/1088183003/diff/20001/ppapi/ppapi_proxy.gypi
File ppapi/ppapi_proxy.gypi (left):

https://codereview.chromium.org/1088183003/diff/20001/ppapi/ppapi_proxy.gypi#...
ppapi/ppapi_proxy.gypi:292: 'proxy/ppb_talk_private_proxy.cc',
On 2015/04/15 20:52:59, bbudge wrote:
> I guess this file doesn't exist, and gyp doesn't complain about excluding it.

Yes, looks like the file itself was moved in
https://codereview.chromium.org/11359147 - I suppose (but don't know gyp well
enough) that excluding a file that doesn't exist is equivalent to excluding a
file that might have been already excluded by another rule. Anyway, seems like a
good time to fix this up.

[jschuh, 2015-04-15 21:23:25]

ipc security lgtm +∞

[Josh Horwich, 2015-04-15 21:28:14]

The CQ bit was checked by jhorwich@chromium.org

[Josh Horwich, 2015-04-15 21:28:14]

The patchset sent to the CQ was uploaded after l-g-t-m from jam@chromium.org
Link to the patchset: https://codereview.chromium.org/1088183003/#ps20001
(title: "Missed a few references")

[commit-bot: I haz the power, 2015-04-15 21:29:03]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1088183003/20001

[commit-bot: I haz the power, 2015-04-15 21:35:13]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-04-15 21:36:02]

Patchset 2 (id:??) landed as
https://crrev.com/c2c781c51f26ae067110d8c82aa7c26643649611
Cr-Commit-Position: refs/heads/master@{#325310}