Revert of [Android] Make enhanced bookmark editing UI more straightforward.

Revert of [Android] Make enhanced bookmark editing UI more straightforward. (patchset #8 id:140001 of https://codereview.chromium.org/1230313009/ )

Reason for revert:
http://crbug.com/519368

Original issue's description:
> [Android] Make enhanced bookmark editing UI more straightforward.
>
> - We didn't save when a dialog is dismissed by tapping outside on
>   tablet, which can be also confusing as there is no save UI concept.
>   So save onPause always.
>
> - User should know when we won't save what user typed if it fails
>   validation. But blocking dialog exit is too invasive, and sometimes
>   we don't have a control (tapping outside on tablet.) So show warning
>   as user types.
>
> BUG=510253
>
> Committed: https://crrev.com/5886fc8beb1ae5714f25a8bb1c76a42bfe88272c
> Cr-Commit-Position: refs/heads/master@{#342719}

TBR=ianwen@chromium.org,newt@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=510253
BUT=519368

Committed: https://crrev.com/e4e239b82468281bd98acd8dbf3c76c205d180a2
Cr-Commit-Position: refs/heads/master@{#342826}

[Kibeom Kim (inactive), 2015-08-11 16:05:06]

Created Revert of [Android] Make enhanced bookmark editing UI more
straightforward.

[commit-bot: I haz the power, 2015-08-11 16:05:31]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1278963004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1278963004/1

[commit-bot: I haz the power, 2015-08-11 16:06:14]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-08-11 16:06:56]

Patchset 1 (id:??) landed as
https://crrev.com/e4e239b82468281bd98acd8dbf3c76c205d180a2
Cr-Commit-Position: refs/heads/master@{#342826}