Don't crash the browser when a webui page misbehaves
Don't crash the browser when a webui page misbehaves

Just ignore the call (which is what would happen anyways), and upload a
minidump

BUG=516690
R=creis@chromium.org,dbeam@chromium.org,estade@chromium.org

Review URL: https://codereview.chromium.org/1332513002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#347875}

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