Update apps grid view layout to match latest mocks.

Update apps grid view layout to match latest mocks.

This CL updates the experimental app list's apps grid view layout to
precisely match mocks. The experimental app list is now 768x570.

BUG=442022
Committed: https://crrev.com/ba3c2e3760bd7301dacdb596bc227d9167f30830
Cr-Commit-Position: refs/heads/master@{#315270}

[calamity, 2015-02-06 05:49:30]

calamity@chromium.org changed reviewers:
+ mgiuca@chromium.org

[Matt Giuca, 2015-02-06 06:14:12]

lgtm

Didn't do a very thorough check, but it's all just dimensions changing so I
assume it's correct.

[calamity, 2015-02-06 06:23:09]

The CQ bit was checked by calamity@chromium.org

[commit-bot: I haz the power, 2015-02-06 06:23:28]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/898253002/1

[commit-bot: I haz the power, 2015-02-06 06:26:18]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-02-06 06:26:19]

Try jobs failed on following builders:
  ios_dbg_simulator on tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios_dbg_simulator...)
  ios_rel_device_ninja_ng on tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios_rel_device_ni...)
  mac_chromium_compile_dbg_ng on tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_comp...)

[calamity, 2015-02-09 03:54:54]

The CQ bit was checked by calamity@chromium.org

[commit-bot: I haz the power, 2015-02-09 03:55:08]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/898253002/1

[commit-bot: I haz the power, 2015-02-09 03:57:45]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-02-09 03:57:46]

Try jobs failed on following builders:
  ios_dbg_simulator on tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios_dbg_simulator...)
  ios_rel_device_ng on tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios_rel_device_ng...)
  ios_rel_device_ninja_ng on tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios_rel_device_ni...)

[calamity, 2015-02-09 05:34:53]

New patchsets have been uploaded after l-g-t-m from mgiuca@chromium.org

[calamity, 2015-02-09 06:10:41]

The CQ bit was checked by calamity@chromium.org

[commit-bot: I haz the power, 2015-02-09 06:11:40]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/898253002/20001

[commit-bot: I haz the power, 2015-02-09 06:19:35]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-02-09 06:20:15]

Patchset 2 (id:??) landed as
https://crrev.com/ba3c2e3760bd7301dacdb596bc227d9167f30830
Cr-Commit-Position: refs/heads/master@{#315270}