Cherry-pick libc++ bug fixes.

This fixes the stack trace issue when compiling Android chromium with libc++.

BUG=490275
Change-Id: Ifc12b502535a2c53129f89f6bb5dde2c376ce7c7
Reviewed-on: https://chromium-review.googlesource.com/287200
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Tested-by: Ross McIlroy <rmcilroy@chromium.org>
111 files changed