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- Enables exception handling: throw/try/catch.
- Disables a bunch of warnings that this library is full of.
  - "-Wno-dangling-else"
  - "-Wno-logical-op-parentheses"
  - "-Wno-switch"

Bug: 750327
Change-Id: Ic08f67e328da2f22f3503eab074be6aaf2f2fc90
Reviewed-on: https://chromium-review.googlesource.com/872219Reviewed-by: Ken Rockot <rockot@chromium.org>
Reviewed-by: Nathan Parker <nparker@chromium.org>
Reviewed-by: Jialiu Lin <jialiul@chromium.org>
Commit-Queue: Varun Khaneja <vakh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#531926}