[builtins] Migrate Number constructor similar to String constructor.

src/arm/macro-assembler-arm.cc

Index: src/arm/macro-assembler-arm.cc
diff --git a/src/arm/macro-assembler-arm.cc b/src/arm/macro-assembler-arm.cc
index 5220b05bf846e10587ba0b936782843fdef0f433..57fa3f580492a8aefb7363c777a6af61cd2f626f 100644
--- a/src/arm/macro-assembler-arm.cc
+++ b/src/arm/macro-assembler-arm.cc
@@ -2936,6 +2936,28 @@ void MacroAssembler::AllocateHeapNumberWithValue(Register result,
 }
 
 
+void MacroAssembler::AllocateJSValue(Register result, Register constructor,
+                                     Register value, Register scratch1,
+                                     Register scratch2, Label* gc_required) {
+  DCHECK(!result.is(constructor));
+  DCHECK(!result.is(scratch1));
+  DCHECK(!result.is(scratch2));
+  DCHECK(!result.is(value));
+
+  // Allocate JSValue in new space.
+  Allocate(JSValue::kSize, result, scratch1, scratch2, gc_required, TAG_OBJECT);
+
+  // Initialize the JSValue.
+  LoadGlobalFunctionInitialMap(constructor, scratch1, scratch2);
+  str(scratch1, FieldMemOperand(result, HeapObject::kMapOffset));
+  LoadRoot(scratch1, Heap::kEmptyFixedArrayRootIndex);
+  str(scratch1, FieldMemOperand(result, JSObject::kPropertiesOffset));
+  str(scratch1, FieldMemOperand(result, JSObject::kElementsOffset));
+  str(value, FieldMemOperand(result, JSValue::kValueOffset));
+  STATIC_ASSERT(JSValue::kSize == 4 * kPointerSize);
+}
+
+
 void MacroAssembler::CopyBytes(Register src,
                                Register dst,
                                Register length,