Notify InputMethodBase on TextInputState change to send InputMethodObserver::OnTextInputStateChange…

Notify InputMethodBase on TextInputState change to send InputMethodObserver::OnTextInputStateChanged notification

InputMethodAuraLinux, which is derived from InputMethodBase, has implmented OnTextInputTypeChanged. And InputMethodAuraLinux is not propagating OntextInputTyepChanged to InputMethodBase, because of which InputMethodObserver's does not get the notification OnTextInputStateChanged.

The cl is to propagate the change event to InputMethodBase so that InputMethodObserver APIs are notified appropriately.

TBR=yukawa@chromium.org
BUG=None
TEST=None

Committed: https://crrev.com/a44d2d01e6b6e77f60988cf166971cb79668346e
Cr-Commit-Position: refs/heads/master@{#333008}

[Shu Chen, 2015-06-05 03:29:35]

The CQ bit was checked by shuchen@chromium.org

[commit-bot: I haz the power, 2015-06-05 03:29:55]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1160433006/1

[commit-bot: I haz the power, 2015-06-05 04:04:15]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-06-05 04:05:04]

Patchset 1 (id:??) landed as
https://crrev.com/a44d2d01e6b6e77f60988cf166971cb79668346e
Cr-Commit-Position: refs/heads/master@{#333008}