Adds NetInfo v3 Web API to Blink.

Source/modules/netinfo/NetworkInformation.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 NetworkInformation_h
+#define NetworkInformation_h
+
+#include "bindings/v8/ScriptWrappable.h"
+#include "core/dom/ActiveDOMObject.h"
+#include "core/events/EventTarget.h"
+#include "core/page/NetworkStateNotifier.h"
+#include "public/platform/WebConnectionType.h"
+
+namespace WebCore {
+
+class ExecutionContext;
+
+class NetworkInformation FINAL
+    : public RefCountedWillBeRefCountedGarbageCollected<NetworkInformation>
+    , public ScriptWrappable
+    , public ActiveDOMObject
+    , public EventTargetWithInlineData
+    , public NetworkStateNotifier::NetworkStateObserver {
+    REFCOUNTED_EVENT_TARGET(NetworkInformation);
+    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(NetworkInformation);
+
+public:
+    static PassRefPtrWillBeRawPtr<NetworkInformation> create(ExecutionContext*);
+    virtual ~NetworkInformation();
+
+    String type() const;
+
+    virtual void connectionTypeChange(blink::WebConnectionType) OVERRIDE;
+
+    // EventTarget overrides.
+    virtual const AtomicString& interfaceName() const OVERRIDE;
+    virtual ExecutionContext* executionContext() const OVERRIDE;
+    virtual bool addEventListener(const AtomicString& eventType, PassRefPtr<EventListener>, bool useCapture = false) OVERRIDE;
+    virtual bool removeEventListener(const AtomicString& eventType, EventListener*, bool useCapture = false) OVERRIDE;
+    virtual void removeAllEventListeners() OVERRIDE;
+
+    // ActiveDOMObject overrides.
+    virtual bool hasPendingActivity() const OVERRIDE;
+    virtual void stop() OVERRIDE;
+
+    DEFINE_ATTRIBUTE_EVENT_LISTENER(typechange);
+
+private:
+    explicit NetworkInformation(ExecutionContext*);
+    void startObserving();
+    void stopObserving();
+
+    // Touched only on context thread.
+    blink::WebConnectionType m_type;
+
+    // Whether this object is listening for events from NetworkStateNotifier.
+    bool m_observing;
+
+    // Whether ActiveDOMObject::stop has been called.
+    bool m_contextStopped;
+};
+
+} // namespace WebCore
+
+#endif // NetworkInformation_h