Mark conformance2/misc/uninitialized-test-2.html flaky.

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 92b9b11ca051f13d23cdea6bb5e0a7662932ace5..0db1e4785c737711119fcd42e215fc60e4834dde 100644
--- a/content/test/gpu/gpu_tests/webgl2_conformance_expectations.py
+++ b/content/test/gpu/gpu_tests/webgl2_conformance_expectations.py
@@ -43,6 +43,7 @@ class WebGL2ConformanceExpectations(WebGLConformanceExpectations):
     # All platforms.
     self.Flaky('conformance2/query/occlusion-query.html', bug=603168)
     self.Fail('conformance2/glsl3/tricky-loop-conditions.html', bug=483282)
+    self.Flaky('conformance2/misc/uninitialized-test-2.html', bug=671791)
     self.Fail('conformance2/rendering/depth-stencil-feedback-loop.html',
         bug=660844) # WebGL 2.0.1
     self.Fail('conformance2/rendering/rendering-sampling-feedback-loop.html',
@@ -622,8 +623,6 @@ class WebGL2ConformanceExpectations(WebGLConformanceExpectations):
     self.Fail('deqp/functional/gles3/transformfeedback/array_separate*.html',
         ['linux', 'amd'], bug=483282)
 
-    self.Fail('conformance2/misc/uninitialized-test-2.html',
-        ['linux', 'amd'], bug=483282)
     self.Fail('conformance2/rendering/blitframebuffer-filter-srgb.html',
         ['linux', 'amd'], bug=634525)
     self.Fail('conformance2/rendering/blitframebuffer-outside-readbuffer.html',