Refactor GuestView construction

Refactor GuestView construction

Each GuestView derived type is now responsible for managing it's own construction.

BUG=none

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=284527

[lazyboy, 2014-07-21 17:33:58]

lgtm

[Fady Samuel, 2014-07-21 19:06:47]

The CQ bit was checked by fsamuel@chromium.org

[Fady Samuel, 2014-07-21 19:06:47]

The CQ bit was unchecked by fsamuel@chromium.org

[Fady Samuel, 2014-07-21 19:06:47]

The CQ bit was checked by fsamuel@chromium.org

[commit-bot: I haz the power, 2014-07-21 19:08:05]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/fsamuel@chromium.org/409603003/1

[commit-bot: I haz the power, 2014-07-21 21:04:12]

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

[commit-bot: I haz the power, 2014-07-21 21:06:58]

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

[commit-bot: I haz the power, 2014-07-21 21:06:59]

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

[Fady Samuel, 2014-07-21 21:42:12]

The CQ bit was checked by fsamuel@chromium.org

[commit-bot: I haz the power, 2014-07-21 21:47:39]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/fsamuel@chromium.org/409603003/1

[commit-bot: I haz the power, 2014-07-21 22:49:56]

Change committed as 284527