Remove two lines of failure entries in gpu pixel expectation page

Our previous CL: https://codereview.chromium.org/2391883004/ that
implements WebGL's commit with software compositing has been picked up
by all GPU bots, and all generated images are looking good. So this CL
removes these two failure entires.

BUG=563852
TBR=kbr@chromium.org
CQ_INCLUDE_TRYBOTS=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;master.tryserver.chromium.android:android_optional_gpu_tests_rel

Review-Url: https://codereview.chromium.org/2398093002
Cr-Commit-Position: refs/heads/master@{#423563}
1 file changed