Move code that doesn't depend on PPAPI out of remoting/client/plugin

Move code that doesn't depend on PPAPI out of remoting/client/plugin

remoting/client/plugin contained some files that didn't depend on PPAPI
and had unittests. Once the plugin is removed from chrome the plugin
will only be compiled for PNaCl, but in order to keep the unittests
working these files will still need to be compiled natively. Moving them
out of the plugin directory makes it clear which files are compiled
only for PNaCl. Also the moved files are not specific to the plugin
and would be useful in a native app if we were to implement one.

BUG=510271
Committed: https://crrev.com/652b4b61384e9224e61971e64096815f116e8970
Cr-Commit-Position: refs/heads/master@{#338977}

[Sergey Ulanov, 2015-07-15 00:18:28]

sergeyu@chromium.org changed reviewers:
+ dcaiafa@chromium.org

[dcaiafa, 2015-07-15 23:38:11]

lgtm

[Sergey Ulanov, 2015-07-16 00:36:22]

The CQ bit was checked by sergeyu@chromium.org

[commit-bot: I haz the power, 2015-07-16 00:37:00]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1228333004/1

[commit-bot: I haz the power, 2015-07-16 00:43:32]

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

[commit-bot: I haz the power, 2015-07-16 00:43:33]

Try jobs failed on following builders:
  android_chromium_gn_compile_dbg on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/android_chromiu...)
  linux_chromium_gn_chromeos_rel on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)
  linux_chromium_gn_dbg on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)
  win8_chromium_ng on tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win8_chromium_ng/...)

(exceeded global retry quota)

[Sergey Ulanov, 2015-07-16 00:45:03]

The CQ bit was checked by sergeyu@chromium.org

[commit-bot: I haz the power, 2015-07-16 00:45:22]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1228333004/1

[commit-bot: I haz the power, 2015-07-16 00:48:17]

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

[commit-bot: I haz the power, 2015-07-16 00:48:18]

Try jobs failed on following builders:
  linux_chromium_gn_chromeos_rel on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)
  linux_chromium_gn_dbg on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)
  win8_chromium_ng on tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win8_chromium_ng/...)

(exceeded global retry quota)

[Sergey Ulanov, 2015-07-16 01:10:00]

The CQ bit was checked by sergeyu@chromium.org

[commit-bot: I haz the power, 2015-07-16 01:10:28]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1228333004/1

[commit-bot: I haz the power, 2015-07-16 01:15:12]

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

[commit-bot: I haz the power, 2015-07-16 01:15:13]

Try jobs failed on following builders:
  android_chromium_gn_compile_rel on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/android_chromiu...)
  linux_chromium_gn_rel on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

(exceeded global retry quota)

[Sergey Ulanov, 2015-07-16 01:38:29]

The CQ bit was checked by sergeyu@chromium.org

[commit-bot: I haz the power, 2015-07-16 01:38:47]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1228333004/1

[commit-bot: I haz the power, 2015-07-16 01:50:42]

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

[commit-bot: I haz the power, 2015-07-16 01:50:43]

Try jobs failed on following builders:
  win_chromium_x64_rel_ng on tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_...)

(exceeded global retry quota)

[Sergey Ulanov, 2015-07-16 02:05:02]

The CQ bit was checked by sergeyu@chromium.org

[Sergey Ulanov, 2015-07-16 02:05:02]

The patchset sent to the CQ was uploaded after l-g-t-m from dcaiafa@chromium.org
Link to the patchset: https://codereview.chromium.org/1228333004/#ps20001
(title: " ")

[commit-bot: I haz the power, 2015-07-16 02:05:14]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1228333004/20001

[commit-bot: I haz the power, 2015-07-16 03:06:10]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-07-16 03:06:59]

Patchset 2 (id:??) landed as
https://crrev.com/652b4b61384e9224e61971e64096815f116e8970
Cr-Commit-Position: refs/heads/master@{#338977}