Fix a crash that custom tab sends reader mode urls in intent

Fix a crash that custom tab sends reader mode urls in intent

In reader mode Tab#getUrl() will return a distiller style url that is
not parsable to ChromeLauncherActivity. This CL fixes it by getting the
real url.

BUG=522891
Committed: https://crrev.com/a46df84b4131e0d89b49f627eea52573e3e1f78a
Cr-Commit-Position: refs/heads/master@{#350365}

[Ian Wen, 2015-09-22 23:27:57]

ianwen@chromium.org changed reviewers:
+ yusufo@chromium.org

[Ian Wen, 2015-09-22 23:27:58]

PTAL

[Yusuf, 2015-09-22 23:28:48]

lgtm

[Ian Wen, 2015-09-22 23:34:38]

The CQ bit was checked by ianwen@chromium.org

[commit-bot: I haz the power, 2015-09-22 23:36:50]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1366453002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1366453002/1

[commit-bot: I haz the power, 2015-09-23 04:41:31]

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

[commit-bot: I haz the power, 2015-09-23 04:41:32]

Try jobs failed on following builders:
  linux_android_rel_ng on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_android_r...)

[Ian Wen, 2015-09-23 20:27:55]

The CQ bit was checked by ianwen@chromium.org

[commit-bot: I haz the power, 2015-09-23 20:29:46]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1366453002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1366453002/1

[commit-bot: I haz the power, 2015-09-23 20:40:03]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-23 20:42:26]

Patchset 1 (id:??) landed as
https://crrev.com/a46df84b4131e0d89b49f627eea52573e3e1f78a
Cr-Commit-Position: refs/heads/master@{#350365}