Add the first very basic bits of a geofencing API.

Source/modules/geolocation/CircularRegion.cpp

Index: Source/modules/geolocation/CircularRegion.cpp
diff --git a/Source/modules/geolocation/CircularRegion.cpp b/Source/modules/geolocation/CircularRegion.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..0fdb73b96ce4e83f4702510ab66f8fb7e2841435
--- /dev/null
+++ b/Source/modules/geolocation/CircularRegion.cpp
@@ -0,0 +1,37 @@
+// 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/geolocation/CircularRegion.h"
+
+#include "bindings/core/v8/Dictionary.h"
+
+namespace WebCore {
+
+CircularRegionInit::CircularRegionInit(const Dictionary& init)
+    : latitude(0)
+    , longitude(0)
+    , radius(0)
+{
+    DictionaryHelper::get(init, "id", id);
+    DictionaryHelper::get(init, "latitude", latitude);
+    DictionaryHelper::get(init, "longitude", longitude);
+    DictionaryHelper::get(init, "radius", radius);
+}
+
+CircularRegion* CircularRegion::create(const Dictionary& init)
+{
+    return new CircularRegion(CircularRegionInit(init));
+}
+
+CircularRegion::CircularRegion(const CircularRegionInit& init)
+    : GeofencingRegion(init.id)
+    , m_latitude(init.latitude)
+    , m_longitude(init.longitude)
+    , m_radius(init.radius)
+{
+    ScriptWrappable::init(this);
+}
+
+} // namespace WebCore