Remove a webgl 2 conformance test from flaky list.

content/test/gpu/gpu_tests/webgl2_conformance_expectations.py

Index: content/test/gpu/gpu_tests/webgl2_conformance_expectations.py
diff --git a/content/test/gpu/gpu_tests/webgl2_conformance_expectations.py b/content/test/gpu/gpu_tests/webgl2_conformance_expectations.py
index 951d63fe7b6d75be1eaa1ded670c957de9c7e213..3f1ff0d410debb5bf602699d31b1b2952fd72fc0 100644
--- a/content/test/gpu/gpu_tests/webgl2_conformance_expectations.py
+++ b/content/test/gpu/gpu_tests/webgl2_conformance_expectations.py
@@ -418,10 +418,6 @@ class WebGL2ConformanceExpectations(WebGLConformanceExpectations):
         ['linux'], bug=483282)
     self.Fail('conformance2/rendering/draw-buffers.html',
         ['linux'], bug=483282)
-    # Flaky because the virtual gl contexts implementation calls glUseProgram
-    # while a transform feedback is active.
-    self.Flaky('deqp/functional/gles3/negativeshaderapi.html',
-        ['linux'], bug=483282)
 
     self.Skip('deqp/data/gles3/shaders/qualification_order.html',
         ['linux', 'amd', 'intel'], bug=483282)