Disable clearing textures for robust init on Mac.

Suspecting this path generates errors and hangs.

Bug: chromium:1253356
Change-Id: I0ef4a71578fa15631074f394d49e9878f3e301df
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3187131
Commit-Queue: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Jonah Ryan-Davis <jonahr@google.com>
diff --git a/src/libANGLE/renderer/gl/renderergl_utils.cpp b/src/libANGLE/renderer/gl/renderergl_utils.cpp
index e251ffd..4fb3dee 100644
--- a/src/libANGLE/renderer/gl/renderergl_utils.cpp
+++ b/src/libANGLE/renderer/gl/renderergl_utils.cpp
@@ -2005,7 +2005,7 @@
                             IsAndroid() || (IsApple() && (isIntel || isAMD || isNvidia)));
     ANGLE_FEATURE_CONDITION(features, limitMax3dArrayTextureSizeTo1024, limitMaxTextureSize);
 
-    ANGLE_FEATURE_CONDITION(features, allowClearForRobustResourceInit, IsApple());
+    ANGLE_FEATURE_CONDITION(features, allowClearForRobustResourceInit, false);
 
     // The WebGL conformance/uniforms/out-of-bounds-uniform-array-access test has been seen to fail
     // on AMD and Android devices.