Skip gl_uniform_arrays on Win Debug Intel

Per discussion in the bug

BUG=678382
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/2620563002
Cr-Commit-Position: refs/heads/master@{#442099}

content/test/gpu/gpu_tests/webgl_conformance_expectations.py

@@ -143,7 +143,7 @@ class WebGLConformanceExpectations(GpuTestExpectations):
               ['win7', 'intel', 'no_passthrough'])
 
     # Win / Intel failures
-    self.Flaky('conformance/uniforms/gl-uniform-arrays.html',
+    self.Skip('conformance/uniforms/gl-uniform-arrays.html',
         ['win', 'debug', 'intel'], bug=678382)
 
     # Win / AMD flakiness seen on new tryservers.