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We were resizing the content window based off of an uninitialized
projection matrix, causing it to be very large.

Cq-Include-Trybots: master.tryserver.chromium.android:android_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
Change-Id: I6fabecefefe75c78bfecef746ec298e24da5b771
Reviewed-on: https://chromium-review.googlesource.com/827625Reviewed-by: Tibor Goldschwendt <tiborg@chromium.org>
Commit-Queue: Michael Thiessen <mthiesse@chromium.org>
Cr-Commit-Position: refs/heads/master@{#524183}