Always invoke C++ ArrayPush builtin.

src/arm/stub-cache-arm.cc

Index: src/arm/stub-cache-arm.cc
diff --git a/src/arm/stub-cache-arm.cc b/src/arm/stub-cache-arm.cc
index 5d5b2a5d9a5d33d89e561a6758208c861038d2b8..fc652c10a6c28c1a0ead705b58147c18f9319e41 100644
--- a/src/arm/stub-cache-arm.cc
+++ b/src/arm/stub-cache-arm.cc
@@ -916,18 +916,6 @@ Object* CallStubCompiler::CompileCallConstant(Object* object,
       break;
     }
 
-    case JSARRAY_HAS_FAST_ELEMENTS_CHECK:
-      CheckPrototypes(JSObject::cast(object), r1, holder, r3, r0, name, &miss);
-      // Make sure object->HasFastElements().
-      // Get the elements array of the object.
-      __ ldr(r3, FieldMemOperand(r1, JSObject::kElementsOffset));
-      // Check that the object is in fast mode (not dictionary).
-      __ ldr(r0, FieldMemOperand(r3, HeapObject::kMapOffset));
-      __ LoadRoot(ip, Heap::kFixedArrayMapRootIndex);
-      __ cmp(r0, ip);
-      __ b(ne, &miss);
-      break;
-
     default:
       UNREACHABLE();
   }