Version 4.3.61.13 (cherry-pick)

src/hydrogen-instructions.h

Index: src/hydrogen-instructions.h
diff --git a/src/hydrogen-instructions.h b/src/hydrogen-instructions.h
index 5cf575c9e5efb91b38daab91bcf2368d856b7069..2461ee46b500a941e90e03533e7a978d468ad8a7 100644
--- a/src/hydrogen-instructions.h
+++ b/src/hydrogen-instructions.h
@@ -2574,7 +2574,9 @@ class HUnaryMathOperation FINAL : public HTemplateInstruction<2> {
   // Math.round.
   bool SupportsFlexibleFloorAndRound() const {
 #ifdef V8_TARGET_ARCH_ARM64
-    return true;
+    // TODO(rmcilroy): Re-enable this for Arm64 once http://crbug.com/476477 is
+    // fixed.
+    return false;
 #else
     return false;
 #endif