WebGL CTS: fragmentoutput are fixed on Linux Intel ANGLE

TBR=kbr@chromium.org
BUG=598902
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/2344983002
Cr-Commit-Position: refs/heads/master@{#419061}

content/test/gpu/gpu_tests/webgl2_conformance_expectations.py

@@ -538,8 +538,6 @@ class WebGL2ConformanceExpectations(WebGLConformanceExpectations):
         ['linux', 'intel'], bug=635528)
 
     # Linux Intel with ANGLE only
-    self.Fail('deqp/functional/gles3/fragmentoutput/*.html',
-        ['linux', 'intel', 'opengl'], bug=598902)
     self.Fail('conformance2/textures/misc/copy-texture-image-luma-format.html',
         ['linux', 'intel', 'opengl'], bug=1492) # ANGLE bug id