Move |kSwitchNames| to anonymous namespace.

Move |kSwitchNames| to anonymous namespace.

This makes GpuProcessHost::LaunchGpuProcess significantly easier to read.
This is in preparation for getting rid of the GPU broker process.
Also make "GPU process" capitalization consistent.

BUG=329375
TEST=content_shell boots, --disable-gpu-sandbox gets propagated.

Committed: https://crrev.com/1f4903ba455aed8cb3863dd41028759158d50c57
Cr-Commit-Position: refs/heads/master@{#291586}

[Jorge Lucangeli Obes, 2014-08-22 20:45:15]

Hey guys, I think this is a lot more readable. What do you think?

[piman, 2014-08-22 20:54:05]

lgtm

[Jorge Lucangeli Obes, 2014-08-22 21:06:49]

The CQ bit was checked by jorgelo@chromium.org

[commit-bot: I haz the power, 2014-08-22 21:07:41]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/jorgelo@chromium.org/498833002/1

[commit-bot: I haz the power, 2014-08-22 22:11:25]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  win_chromium_rel_swarming on tryserver.chromium.win
(http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_rel_...)

[commit-bot: I haz the power, 2014-08-22 22:55:31]

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

[commit-bot: I haz the power, 2014-08-22 22:55:32]

Try jobs failed on following builders:
  win_chromium_rel_swarming on tryserver.chromium.win
(http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_rel_...)

[Jorge Lucangeli Obes, 2014-08-22 22:56:38]

On 2014/08/22 22:55:32, I haz the power (commit-bot) wrote:
> Try jobs failed on following builders:
>   win_chromium_rel_swarming on tryserver.chromium.win
>
(http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_rel_...)

Trybot failed with and without patch:

[swarming] browser_tests (with patch) [swarming] browser_tests (with patch) 541
disabled 4 flaky failed 1 
failures:
TabCaptureApiPixelTest.EndToEnd
 ( 9 mins, 49 secs )

[swarming] browser_tests (without patch) [swarming] browser_tests (without
patch) 541 disabled ( 53 secs )
browser_tests browser_tests 
failures:
TabCaptureApiPixelTest.EndToEnd

[Jorge Lucangeli Obes, 2014-08-22 22:56:40]

The CQ bit was checked by jorgelo@chromium.org

[commit-bot: I haz the power, 2014-08-22 22:57:05]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/jorgelo@chromium.org/498833002/1

[commit-bot: I haz the power, 2014-08-23 21:36:15]

Committed patchset #1 (1) as 81737639c1c069c834b1113976d4c33541521535

[commit-bot: I haz the power, 2014-09-10 02:31:10]

Patchset 1 (id:??) landed as
https://crrev.com/1f4903ba455aed8cb3863dd41028759158d50c57
Cr-Commit-Position: refs/heads/master@{#291586}