Pass through the geofencing API calls to the content layer.

public/platform/WebGeofencingClient.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 WebGeofencingClient_h
+#define WebGeofencingClient_h
+
+#include "public/platform/WebCallbacks.h"
+#include "public/platform/WebGeofencingError.h"
+#include "public/platform/WebString.h"
+#include "public/platform/WebVector.h"
+
+namespace blink {
+
+class WebGeofencingRegion;
+class WebServiceWorkerProvider;
+
+typedef WebCallbacks<WebGeofencingError, WebGeofencingError> WebGeofencingCallbacks;
+typedef WebCallbacks<WebVector<WebGeofencingRegion>, WebGeofencingError> WebGeofencingRegionsCallbacks;
+
+class WebGeofencingClient {
+public:
+    virtual ~WebGeofencingClient() { }
+
+    // Registers a region. The provider must always pass null to onSuccess.
+    // Ownership of the WebGeofencingCallbacks is transferred to the client.
+    // FIXME: somehow cleanup the callback type to not have a success type.

[Peter Beverloo, 2014/07/14 17:23:09]

Has anyone filed a bug to track this? Resolving (or rejecting) a promise with
undefined shouldn't be too uncommon.

Perhaps it would be nice to resolve the promise with the Id of the newly
(un)registered promise, in case a developer wants to re-use a function for the
callbacks.

+    virtual void registerRegion(const WebGeofencingRegion&, WebGeofencingCallbacks*, WebServiceWorkerProvider*) = 0;
+
+    // Deregisters a region. The provider must always pass null to onSuccess.
+    // Ownership of the WebGeofencingCallbacks is transferred to the client.
+    // FIXME: somehow cleanup the callback type to not have a success type.
+    virtual void unregisterRegion(const WebString& regionId, WebGeofencingCallbacks*, WebServiceWorkerProvider*) = 0;
+
+    // Returns all the currently registered regions.
+    // Ownership of the WebGeofencingRegionsCallbacks is transferred to the client.
+    virtual void getRegisteredRegions(WebGeofencingRegionsCallbacks*, WebServiceWorkerProvider*) = 0;
+};
+
+} // namespace blink
+
+#endif // WebGeofencingClient_h