Fix WebView not to hide soft keyboard on navigation

Fix WebView not to hide soft keyboard on navigation

We were calling ImeAdapter#reset() (now renamed as resetAndHideKeyboard)
whenever navigation occurred. This change was introduced in
https://codereview.chromium.org/1278593004 .
However, there are cases, e.g. email client using WebView, where we don't
want the behavior. (b/27547367)

We will still call resetAndHideKeyboard() when renderer process is gone
as a safety net for ImeThread feature, and hide keyboard through
updateKeyboardVisibility() function.

BUG=601707
Review-Url: https://codereview.chromium.org/2001983002
Cr-Commit-Position: refs/heads/master@{#395535}
(cherry picked from commit cbd74f1402d7f3d87b032ea9ee1d4d65f6fcde8c)

Committed: https://chromium.googlesource.com/chromium/src/+/b51b4d1b8571092c7e6883e83f6a682521975388

[Changwan Ryu, 2016-05-26 01:41:13]

Description was changed from

==========
Fix WebView not to hide soft keyboard on navigation

We were calling ImeAdapter#reset() (now renamed as resetAndHideKeyboard)
whenever navigation occurred. This change was introduced in
https://codereview.chromium.org/1278593004 .
However, there are cases, e.g. email client using WebView, where we don't
want the behavior. (b/27547367)

We will still call resetAndHideKeyboard() when renderer process is gone
as a safety net for ImeThread feature, and hide keyboard through
updateKeyboardVisibility() function.

BUG=601707

Review-Url: https://codereview.chromium.org/2001983002
Cr-Commit-Position: refs/heads/master@{#395535}
(cherry picked from commit cbd74f1402d7f3d87b032ea9ee1d4d65f6fcde8c)
==========

to

==========
Fix WebView not to hide soft keyboard on navigation

We were calling ImeAdapter#reset() (now renamed as resetAndHideKeyboard)
whenever navigation occurred. This change was introduced in
https://codereview.chromium.org/1278593004 .
However, there are cases, e.g. email client using WebView, where we don't
want the behavior. (b/27547367)

We will still call resetAndHideKeyboard() when renderer process is gone
as a safety net for ImeThread feature, and hide keyboard through
updateKeyboardVisibility() function.

BUG=601707

Review-Url: https://codereview.chromium.org/2001983002
Cr-Commit-Position: refs/heads/master@{#395535}
(cherry picked from commit cbd74f1402d7f3d87b032ea9ee1d4d65f6fcde8c)

Committed:
https://chromium.googlesource.com/chromium/src/+/b51b4d1b8571092c7e6883e83f6a...
==========

[Changwan Ryu, 2016-05-26 01:41:16]

Committed patchset #1 (id:1) manually as
b51b4d1b8571092c7e6883e83f6a682521975388.