Revert of Disallow subclassing Arrays.

src/arm64/builtins-arm64.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_ARM64
 
 #include "src/codegen.h"
 #include "src/debug.h"
@@ skipping 108 matching lines @@
     // Initial map for the builtin Array functions should be maps.
     __ Ldr(x10, FieldMemOperand(x1, JSFunction::kPrototypeOrInitialMapOffset));
     __ Tst(x10, kSmiTagMask);
     __ Assert(ne, kUnexpectedInitialMapForArrayFunction);
     __ CompareObjectType(x10, x11, x12, MAP_TYPE);
     __ Assert(eq, kUnexpectedInitialMapForArrayFunction);
   }
 
   // Run the native code for the Array function called as a normal function.
   __ LoadRoot(x2, Heap::kUndefinedValueRootIndex);
-  __ Mov(x3, x1);
   ArrayConstructorStub stub(masm->isolate());
   __ TailCallStub(&stub);
 }
 
 
 void Builtins::Generate_StringConstructCode(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- x0                     : number of arguments
   //  -- x1                     : constructor function
   //  -- lr                     : return address
@@ skipping 1529 matching lines @@
     __ Unreachable();
   }
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM