Updating test expectations for 2 WebGL tests.

content/test/gpu/gpu_tests/webgl_conformance_expectations.py

Index: content/test/gpu/gpu_tests/webgl_conformance_expectations.py
diff --git a/content/test/gpu/gpu_tests/webgl_conformance_expectations.py b/content/test/gpu/gpu_tests/webgl_conformance_expectations.py
index 97067054acdcad9a1b1f519f81914c0a2ab7bf0f..2b55246d041cdb73c10068ade3a1f4656d466e31 100644
--- a/content/test/gpu/gpu_tests/webgl_conformance_expectations.py
+++ b/content/test/gpu/gpu_tests/webgl_conformance_expectations.py
@@ -143,4 +143,7 @@ class WebGLConformanceExpectations(test_expectations.TestExpectations):
     # The following test is very slow and therefore times out on Android bot.
     self.Skip('conformance/rendering/multisample-corruption.html',
         ['android'])
-
+    self.Fail('conformance/glsl/misc/empty_main.vert.html',
+        ['android'], bug=315976)
+    self.Fail('conformance/glsl/misc/gl_position_unset.vert.html',
+        ['android'], bug=315976)