Removes ContextFactory::Get/SetInstance

Removes ContextFactory::Get/SetInstance

BUG=379399
TEST=none
TBR=piman@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=274283

[sky, 2014-06-01 19:51:50]

I'm TBRing this as it's just dead code removal at this point.

[sky, 2014-06-01 19:51:54]

The CQ bit was checked by sky@chromium.org

[commit-bot: I haz the power, 2014-06-01 19:52:11]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/sky@chromium.org/307963007/60001

[tfarina, 2014-06-01 19:54:31]

This probably fixes http://crbug.com/379399

[commit-bot: I haz the power, 2014-06-02 00:47:17]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  linux_chromium_chromeos_clang_dbg on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/linux_chromium_chrome...)
  linux_chromium_chromeos_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/linux_chromium_chrome...)
  linux_chromium_clang_dbg on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/linux_chromium_clang_...)
  linux_chromium_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/linux_chromium_rel/bu...)

[commit-bot: I haz the power, 2014-06-02 01:19:21]

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

[commit-bot: I haz the power, 2014-06-02 01:19:21]

Try jobs failed on following builders:
  linux_chromium_chromeos_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/linux_chromium_chrome...)

[piman, 2014-06-02 06:51:27]

LGTM, woot!

[sky, 2014-06-02 14:51:58]

The CQ bit was checked by sky@chromium.org

[commit-bot: I haz the power, 2014-06-02 14:53:49]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/sky@chromium.org/307963007/80001

[commit-bot: I haz the power, 2014-06-02 18:14:05]

Change committed as 274283