Skip two WebGL 2.0 conformance tests on Win Intel.

The following two tests are causing graphical corruption and other
strange behaviors:

  WebglConformance.conformance2_textures_misc_copy_texture_image
  WebglConformance.deqp_functional_gles3_texturespecification_teximage3d_depth_pbo

BUG=617449
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_optional_gpu_tests_rel;tryserver.chromium.mac:mac_optional_gpu_tests_rel;tryserver.chromium.win:win_optional_gpu_tests_rel
TBR=jmadill@chromium.org, zmo@chromium.org

Review-Url: https://codereview.chromium.org/2048453003
Cr-Commit-Position: refs/heads/master@{#398241}

content/test/gpu/gpu_tests/webgl2_conformance_expectations.py

@@ -279,11 +279,16 @@ class WebGL2ConformanceExpectations(WebGLConformanceExpectations):
     # Win / Intel
     self.Fail('conformance2/buffers/uniform-buffers.html',
         ['win', 'intel'], bug=483282)
+    self.Skip('conformance2/textures/misc/copy-texture-image.html',
+        ['win', 'intel'], bug=617449)
     self.Fail('deqp/functional/gles3/shaderstruct.html',
         ['win', 'intel'], bug=483282)
     self.Fail('deqp/functional/gles3/texturespecification/' +
         'teximage3d_depth.html',
         ['win', 'intel'], bug=614418)
+    self.Skip('deqp/functional/gles3/texturespecification/' +
+        'teximage3d_depth_pbo.html',
+        ['win', 'intel'], bug=617449)
     self.Fail('deqp/functional/gles3/texturespecification/' +
         'texsubimage3d_depth.html',
         ['win', 'intel'], bug=614418)