Start to implement FetchEvent for ServiceWorker

public/web/WebServiceWorkerFetchResponse.h

+// 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.
+
+#ifndef WebServiceWorkerFetchResponse_h
+#define WebServiceWorkerFetchResponse_h
+
+#include "public/platform/WebPrivatePtr.h"
+#include "public/platform/WebString.h"
+#include "public/platform/WebVector.h"
+
+#if BLINK_IMPLEMENTATION
+namespace WTF { template <typename T> class PassRefPtr; }
+#endif
+
+namespace WebCore { class Response; }
+
+namespace blink {
+
+// Represents a response to a fetch event.
+class WebServiceWorkerFetchResponse {

[kinuko, 2014/02/26 05:42:49]

It's a bit questionable if we want to share this interface /w other APIs that
rely on Response object, e.g. Cache and Fetch(). If so probably we'd better
consider which layer this should be in (public/web or public/platform), if this
interface should have 'fetch' in its name, if the type Fallback is appropriate
here etc.

[falken, 2014/02/27 06:45:09]

As you once suggested, let me kick the web/ stuff to a separate patch for easier
reviewing.

+public:
+    enum Type { FallbackToNative, Response };
+
+    ~WebServiceWorkerFetchResponse();
+    BLINK_EXPORT Type type() const { return m_type; }
+    BLINK_EXPORT unsigned short statusCode() const;
+    BLINK_EXPORT WebString statusText() const;
+    BLINK_EXPORT WebString method() const;
+
+    // FIXME: Eventually this should have additional methods like:
+    // BLINK_EXPORT WebVector<WebString> headerKeys();
+    // BLINK_EXPORT WebString header(WebString key);
+    // BLINK_EXPORT WebBlob toBlob();
+
+#if BLINK_IMPLEMENTATION
+    WebServiceWorkerFetchResponse(Type);
+    WebServiceWorkerFetchResponse(const WTF::PassRefPtr<WebCore::Response>&);
+#endif
+
+private:
+    Type m_type;
+
+#if BLINK_IMPLEMENTATION
+    WebPrivatePtr<WebCore::Response> m_private;
+#endif
+};
+
+} // namespace blink
+
+#endif // WebServiceWorkerFetchResponse_h