Check whether a second intent should be ignored in custom tabs

Check whether a second intent should be ignored in custom tabs

A custom tab can clobber a second intent that comes with the same
session id. When this happens we should be using IntentHandler#shouldIgnoreIntent
to check the validity of the intent like we do in
ChromeActivity#onNewIntentWithNative

BUG=507976
Committed: https://crrev.com/466bf49ffe26f66554e044fd1e9dbb29665bb7ac
Cr-Commit-Position: refs/heads/master@{#337879}

[Yusuf, 2015-07-08 17:36:37]

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

[Ted C, 2015-07-08 17:39:18]

lgtm

[Yusuf, 2015-07-08 17:43:15]

The CQ bit was checked by yusufo@chromium.org

[Yusuf, 2015-07-08 17:43:15]

The patchset sent to the CQ was uploaded after l-g-t-m from tedchoc@chromium.org
Link to the patchset: https://codereview.chromium.org/1223023002/#ps20001
(title: "Added a log when an intent was ignored")

[commit-bot: I haz the power, 2015-07-08 17:44:03]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1223023002/20001

[commit-bot: I haz the power, 2015-07-08 17:58:17]

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

[commit-bot: I haz the power, 2015-07-08 17:58:18]

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

(exceeded global retry quota)

[Yusuf, 2015-07-08 18:43:05]

The CQ bit was checked by yusufo@chromium.org

[Yusuf, 2015-07-08 18:43:06]

The patchset sent to the CQ was uploaded after l-g-t-m from tedchoc@chromium.org
Link to the patchset: https://codereview.chromium.org/1223023002/#ps40001
(title: "Fixed compile error")

[commit-bot: I haz the power, 2015-07-08 18:44:39]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1223023002/40001

[commit-bot: I haz the power, 2015-07-08 19:24:38]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2015-07-08 19:26:36]

Patchset 3 (id:??) landed as
https://crrev.com/466bf49ffe26f66554e044fd1e9dbb29665bb7ac
Cr-Commit-Position: refs/heads/master@{#337879}