Revert of ReadPixels with GL_HALF_FLOAT_OES when targetting all versions of ES.

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 582d3a649ae0b24448bec5e1a9f658913342c74e..a54ab2664945e616005998d8b3f324064f5e701a 100644
--- a/content/test/gpu/gpu_tests/webgl_conformance_expectations.py
+++ b/content/test/gpu/gpu_tests/webgl_conformance_expectations.py
@@ -112,6 +112,8 @@
         ['win', 'linux', 'nvidia', 'opengl'], bug=1007) # angle bug ID
 
     # Win failures
+    self.Fail('conformance/extensions/oes-texture-half-float.html',
+        ['win'], bug=607283)
     # Note that the following test seems to pass, but it may still be flaky.
     self.Fail('conformance/glsl/constructors/' +
               'glsl-construct-vec-mat-index.html',
@@ -245,6 +247,10 @@
     self.Flaky('conformance/textures/video/' +
                'tex-2d-rgb-rgb-unsigned_short_5_6_5.html',
                ['linux'], bug=627525)
+
+    # OpenGL
+    self.Fail('conformance/extensions/oes-texture-half-float.html',
+        ['linux', 'opengl'], bug=607283)
 
     # NVIDIA
     self.Fail('conformance/extensions/angle-instanced-arrays.html',