IDL: Propagate parser errors occurred in InterfaceMembers

IDL: Propagate parser errors occurred in InterfaceMembers

Otherwise, the IDL compiler goes into an infinite loop when an IDL file
contains unresolved diffs.

BUG=460811
Committed: https://crrev.com/4b657270fe823b2d26e6d1883afe06eda03a2369
Cr-Commit-Position: refs/heads/master@{#319394}

[bashi, 2015-03-06 01:06:03]

bashi@chromium.org changed reviewers:
+ haraken@chromium.org

[bashi, 2015-03-06 01:06:04]

PTAL?

https://codereview.chromium.org/981923002/diff/1/tools/idl_parser/test_parser...
File tools/idl_parser/test_parser/interface_web.idl (right):

https://codereview.chromium.org/981923002/diff/1/tools/idl_parser/test_parser...
tools/idl_parser/test_parser/interface_web.idl:84: <<<<<< ours
I use '<<<<<<' instead of '<<<<<<<' (removed one '<') to pass presubmit checks.

[haraken, 2015-03-06 02:30:46]

LGTM

[bashi, 2015-03-06 02:35:05]

The CQ bit was checked by bashi@chromium.org

[commit-bot: I haz the power, 2015-03-06 02:35:39]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/981923002/1

[commit-bot: I haz the power, 2015-03-06 02:39:21]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-06 02:40:06]

Patchset 1 (id:??) landed as
https://crrev.com/4b657270fe823b2d26e6d1883afe06eda03a2369
Cr-Commit-Position: refs/heads/master@{#319394}