Read WebUSB landing page even if allowed origin read fails

Read WebUSB landing page even if allowed origin read fails

Now that support for the GET_ALLOWED_ORIGINS request is optional WebUSB
devices may only support the GET_URL request used for reading the
landing page from the device. This patch fixes the descriptor reading
logic so that this is supported.

(Note, the logic to send the GET_ALLOWED_ORIGINS request will be removed
entirely as part of issue 711443.)

BUG=721546
Review-Url: https://codereview.chromium.org/2876463008
Cr-Original-Commit-Position: refs/heads/master@{#471141}
Review-Url: https://codereview.chromium.org/2879633004 .
Cr-Commit-Position: refs/branch-heads/3071@{#529}
Cr-Branched-From: a106f0abbf69dad349d4aaf4bcc4f5d376dd2377-refs/heads/master@{#464641}
Committed: https://chromium.googlesource.com/chromium/src/+/f00121a64ad04ba8f63eeb958c834d59c5700217

[Reilly Grant (use Gerrit), 2017-05-12 18:05:52]

Description was changed from

==========
Read WebUSB landing page even if allowed origin read fails

Now that support for the GET_ALLOWED_ORIGINS request is optional WebUSB
devices may only support the GET_URL request used for reading the
landing page from the device. This patch fixes the descriptor reading
logic so that this is supported.

(Note, the logic to send the GET_ALLOWED_ORIGINS request will be removed
entirely as part of issue 711443.)

BUG=721546

Review-Url: https://codereview.chromium.org/2876463008
Cr-Commit-Position: refs/heads/master@{#471141}
(cherry picked from commit 84869d699fe82560ca9ac3f30c5b959110af30bf)
==========

to

==========
Read WebUSB landing page even if allowed origin read fails

Now that support for the GET_ALLOWED_ORIGINS request is optional WebUSB
devices may only support the GET_URL request used for reading the
landing page from the device. This patch fixes the descriptor reading
logic so that this is supported.

(Note, the logic to send the GET_ALLOWED_ORIGINS request will be removed
entirely as part of issue 711443.)

BUG=721546

Review-Url: https://codereview.chromium.org/2876463008
Cr-Original-Commit-Position: refs/heads/master@{#471141}
Review-Url: https://codereview.chromium.org/2879633004 .
Cr-Commit-Position: refs/branch-heads/3071@{#529}
Cr-Branched-From:
a106f0abbf69dad349d4aaf4bcc4f5d376dd2377-refs/heads/master@{#464641}
Committed:
https://chromium.googlesource.com/chromium/src/+/f00121a64ad04ba8f63eeb958c83...
==========

[Reilly Grant (use Gerrit), 2017-05-12 18:05:53]

Committed patchset #1 (id:1) manually as
f00121a64ad04ba8f63eeb958c834d59c5700217.