Ensure MimeHandlerView plugins load properly with long URLs

Ensure MimeHandlerView plugins load properly with long URLs

Currently if a URL which is handled by a MimeHandlerView is too long,
mojo will refuse to send the string inside the StreamDetails which are sent to
the renderer. In these cases we truncate the URL which gets sent.

BUG=478389
Committed: https://crrev.com/b9a01b52a30232e1b0c9afeafb5ce99138d815e5
Cr-Commit-Position: refs/heads/master@{#326468}

[raymes, 2015-04-23 04:28:26]

raymes@chromium.org changed reviewers:
+ sammc@chromium.org

[raymes, 2015-04-23 04:28:27]

PTAL I'd like to land this even though I don't know the root cause yet so we can
get something into M43

[raymes, 2015-04-23 04:29:03]

(also I filed https://code.google.com/p/chromium/issues/detail?id=480099)

[Sam McNally, 2015-04-23 04:59:32]

lgtm

[raymes, 2015-04-23 05:01:38]

The CQ bit was checked by raymes@chromium.org

[commit-bot: I haz the power, 2015-04-23 05:01:51]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1062283003/60001

[commit-bot: I haz the power, 2015-04-23 05:52:25]

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

[commit-bot: I haz the power, 2015-04-23 05:52:26]

Try jobs failed on following builders:
  mac_chromium_rel_ng on tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_rel_...)

[raymes, 2015-04-23 06:05:20]

The CQ bit was checked by raymes@chromium.org

[raymes, 2015-04-23 06:05:21]

The patchset sent to the CQ was uploaded after l-g-t-m from sammc@chromium.org
Link to the patchset: https://codereview.chromium.org/1062283003/#ps80001
(title: " ")

[commit-bot: I haz the power, 2015-04-23 06:05:51]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1062283003/80001

[commit-bot: I haz the power, 2015-04-23 07:18:36]

Committed patchset #5 (id:80001)

[commit-bot: I haz the power, 2015-04-23 07:19:34]

Patchset 5 (id:??) landed as
https://crrev.com/b9a01b52a30232e1b0c9afeafb5ce99138d815e5
Cr-Commit-Position: refs/heads/master@{#326468}