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This patch ensures that we initialize all font creation params before
reading them and abort creating a typeface if the reader is invalid.

R=enne@chromium.org, ericrk@chromium.org

Bug: 785675
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.android:android_optional_gpu_tests_rel
Change-Id: I7baabeb460c9cb06026c8a82989c7c6f7e970f8f
Reviewed-on: https://chromium-review.googlesource.com/808748Reviewed-by: Khushal <khushalsagar@chromium.org>
Commit-Queue: vmpstr <vmpstr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#521806}