Allow passing mock FrameLoaderClient to DummyPageHolder.

Source/bindings/core/v8/ScriptPromiseResolverTest.cpp

 // Copyright 2014 The Chromium 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 "config.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 
 #include "bindings/core/v8/ScriptFunction.h"
 #include "bindings/core/v8/ScriptValue.h"
 #include "bindings/core/v8/V8Binding.h"
 #include "core/dom/DOMException.h"
+#include "core/dom/Document.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/testing/DummyPageHolder.h"
 
 #include <gtest/gtest.h>
 #include <v8.h>
 
 namespace blink {
 
 namespace {
 
@@ skipping 288 matching lines @@
     resolver->reject();
     isolate()->RunMicrotasks();
 
     EXPECT_EQ(String(), onFulfilled);
     EXPECT_EQ("undefined", onRejected);
 }
 
 } // namespace
 
 } // namespace blink