Split the constructor of ThreadableLoader into two methods (ctor and start())

third_party/WebKit/Source/core/loader/MockThreadableLoader.h

+// Copyright 2016 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 "core/loader/ThreadableLoader.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "wtf/PassRefPtr.h"
+
+namespace blink {
+
+class MockThreadableLoader : public ThreadableLoader {
+public:
+    static PassRefPtr<MockThreadableLoader> create() { return adoptRef(new testing::StrictMock<MockThreadableLoader>); }
+
+    MOCK_METHOD1(start, void(const ResourceRequest&));
+    MOCK_METHOD1(overrideTimeout, void(unsigned long));
+    MOCK_METHOD0(cancel, void());
+
+protected:
+    MockThreadableLoader() = default;
+};
+
+} // namespace blink