Adds NetInfo v3 Web API to Blink.

Source/modules/netinfo/NavigatorNetworkInformation.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 "modules/netinfo/NavigatorNetworkInformation.h"
+
+#include "core/frame/DOMWindow.h"
+#include "core/frame/LocalFrame.h"
+#include "core/frame/Navigator.h"
+#include "modules/netinfo/NetworkInformation.h"
+
+namespace WebCore {
+
+NavigatorNetworkInformation::NavigatorNetworkInformation(Navigator& navigator)
+    : DOMWindowProperty(navigator.frame())
+{
+}
+
+NavigatorNetworkInformation::~NavigatorNetworkInformation()
+{
+}
+
+NavigatorNetworkInformation& NavigatorNetworkInformation::from(Navigator& navigator)
+{
+    NavigatorNetworkInformation* supplement = toNavigatorNetworkInformation(navigator);
+    if (!supplement) {
+        supplement = new NavigatorNetworkInformation(navigator);
+        provideTo(navigator, supplementName(), adoptPtrWillBeNoop(supplement));
+    }
+    return *supplement;
+}
+
+NavigatorNetworkInformation* NavigatorNetworkInformation::toNavigatorNetworkInformation(Navigator& navigator)
+{
+    return static_cast<NavigatorNetworkInformation*>(WillBeHeapSupplement<Navigator>::from(navigator, supplementName()));
+}
+
+const char* NavigatorNetworkInformation::supplementName()
+{
+    return "NavigatorNetworkInformation";
+}
+
+NetworkInformation* NavigatorNetworkInformation::connection(Navigator& navigator)
+{
+    return NavigatorNetworkInformation::from(navigator).connection();
+}
+
+NetworkInformation* NavigatorNetworkInformation::connection()
+{
+    if (!m_connection && frame()) {
+        ASSERT(frame()->domWindow());
+        m_connection = NetworkInformation::create(frame()->domWindow()->executionContext());
+    }
+    return m_connection.get();
+}
+
+void NavigatorNetworkInformation::trace(Visitor* visitor)
+{
+    visitor->trace(m_connection);
+    WillBeHeapSupplement<Navigator>::trace(visitor);
+}
+
+} // namespace WebCore