Fixes the initialization of focus and activation management.

Fixes the initialization of focus and activation management.

- We don't have to use DefaultActivationController because
  wm::FocusController provides activation controls.
- FocusController should be registered as a pre-target handler
  to change the focus on mouse click.
- InitializeInputMethodForTesting seems unnecessary. Text input
  is working well while no actual input methods are available.

BUG=None
R=jamescook@chromium.org, oshima@chromium.org
TEST=manually

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=274596

[oshima, 2014-06-03 00:42:52]

lgtm

https://codereview.chromium.org/310463010/diff/20001/apps/shell/browser/shell...
File apps/shell/browser/shell_desktop_controller.cc (left):

https://codereview.chromium.org/310463010/diff/20001/apps/shell/browser/shell...
apps/shell/browser/shell_desktop_controller.cc:235:
ui::InitializeInputMethodForTesting();
can you check if app_shell_browsertests passes with this?

[Jun Mukai, 2014-06-03 00:57:45]

https://codereview.chromium.org/310463010/diff/20001/apps/shell/browser/shell...
File apps/shell/browser/shell_desktop_controller.cc (left):

https://codereview.chromium.org/310463010/diff/20001/apps/shell/browser/shell...
apps/shell/browser/shell_desktop_controller.cc:235:
ui::InitializeInputMethodForTesting();
On 2014/06/03 00:42:53, oshima wrote:
> can you check if app_shell_browsertests passes with this?

It passes.

[James Cook, 2014-06-03 15:54:29]

lgtm

[Jun Mukai, 2014-06-03 17:01:44]

The CQ bit was checked by mukai@chromium.org

[commit-bot: I haz the power, 2014-06-03 17:02:42]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/mukai@chromium.org/310463010/20001

[commit-bot: I haz the power, 2014-06-03 19:50:47]

Change committed as 274596