Add GetProperty/GetElement to JSReceiver and use it where possible

test/unittests/compiler/js-builtin-reducer-unittest.cc

Index: test/unittests/compiler/js-builtin-reducer-unittest.cc
diff --git a/test/unittests/compiler/js-builtin-reducer-unittest.cc b/test/unittests/compiler/js-builtin-reducer-unittest.cc
index 9e14cda7fbe90f3215e855a8aa482d84dfaf71ff..7e122e66e41ce1a40863394a737320178b9f6d94 100644
--- a/test/unittests/compiler/js-builtin-reducer-unittest.cc
+++ b/test/unittests/compiler/js-builtin-reducer-unittest.cc
@@ -43,7 +43,7 @@ class JSBuiltinReducerTest : public TypedGraphTest {
                               isolate()->factory()->NewStringFromAsciiChecked(
                                   "Math")).ToHandleChecked();
     Handle<JSFunction> f = Handle<JSFunction>::cast(
-        JSObject::GetProperty(
+        Object::GetProperty(
             m, isolate()->factory()->NewStringFromAsciiChecked(name))
             .ToHandleChecked());
     return HeapConstant(f);