Android: Don't set the current minutes to the minutes field of <input type=time> dialog.

Android: Don't set the current minutes to the minutes field of <input type=time step=3600> dialog.

For <input type=time step=3600>, the minutes field should be disabled, and the
value should be the minutes of the minimum value, not the current time.
(Actually, it should be the minutes of the step-base value.  This CL adds TODO()
for it.)

Also, this CL fixes a bug for step>3600.  <input type=time step=5400> should
not disable the minutes field.

BUG=409791
Committed: https://crrev.com/f265c25756366f90cebc39d1cbaba410e0842a23
Cr-Commit-Position: refs/heads/master@{#318747}

[tkent, 2015-03-02 08:49:41]

tkent@chromium.org changed reviewers:
+ aurimas@chromium.org

[tkent, 2015-03-02 08:49:42]

aurimas@, would you review this please?

I wanted to add a test, but it's very difficult because I have no physical Linux
box.

[aurimas (slooooooooow), 2015-03-02 18:59:46]

lgtm

[aurimas (slooooooooow), 2015-03-02 19:17:04]

aurimas@chromium.org changed reviewers:
+ anton@chromium.org

[aurimas (slooooooooow), 2015-03-02 19:17:04]

+anton as FYI

[tkent, 2015-03-02 20:10:16]

The CQ bit was checked by tkent@chromium.org

[commit-bot: I haz the power, 2015-03-02 20:11:19]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/954363003/1

[commit-bot: I haz the power, 2015-03-02 21:03:02]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-02 21:04:14]

Patchset 1 (id:??) landed as
https://crrev.com/f265c25756366f90cebc39d1cbaba410e0842a23
Cr-Commit-Position: refs/heads/master@{#318747}