Extend more runtime envs for generateMipmap srgb emulation

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..99f30487981432642634ff404fb5975ef2a9a042 100644
--- a/content/test/gpu/gpu_tests/webgl2_conformance_expectations.py
+++ b/content/test/gpu/gpu_tests/webgl2_conformance_expectations.py
@@ -51,8 +51,6 @@ class WebGL2ConformanceExpectations(WebGLConformanceExpectations):
         'integer-cubemap-specification-order-bug.html',
         bug=483282) # owner:cwallez, test might be buggy
     # Windows only.
-    self.Fail('conformance2/textures/misc/tex-srgb-mipmap.html',
-        ['win'], bug=634519)
     self.Fail('conformance2/rendering/blitframebuffer-outside-readbuffer.html',
         ['win'], bug=644740)
 
@@ -584,8 +582,6 @@ class WebGL2ConformanceExpectations(WebGLConformanceExpectations):
     # Linux Intel with ANGLE only
     self.Fail('deqp/functional/gles3/framebufferblit/conversion_07.html',
         ['linux', 'intel', 'opengl'], bug=598902)
-    self.Fail('conformance2/textures/misc/tex-srgb-mipmap.html',
-        ['linux', 'intel', 'opengl'], bug=634519) # WebGL 2.0.1
 
     # Linux AMD only.
     # It looks like AMD shader compiler rejects many valid ES3 semantics.