Pass through geofencing API calls to the browser process.

content/browser/geofencing/geofencing_dispatcher_host.cc

+// 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 "content/browser/geofencing/geofencing_dispatcher_host.h"
+
+#include "content/common/geofencing_messages.h"
+#include "content/common/geofencing_status.h"
+#include "third_party/WebKit/public/platform/WebCircularGeofencingRegion.h"
+
+namespace content {
+
+static const int kMaxRegionIdLength = 200;

[palmer, 2014/10/02 18:24:00]

Note that, in the future, if you need to increase this, that is OK. It's just
that we want to have *some* limit.

+
+GeofencingDispatcherHost::GeofencingDispatcherHost()
+    : BrowserMessageFilter(GeofencingMsgStart) {
+}
+
+GeofencingDispatcherHost::~GeofencingDispatcherHost() {
+}
+
+bool GeofencingDispatcherHost::OnMessageReceived(const IPC::Message& message) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(GeofencingDispatcherHost, message)
+  IPC_MESSAGE_HANDLER(GeofencingHostMsg_RegisterRegion, OnRegisterRegion)
+  IPC_MESSAGE_HANDLER(GeofencingHostMsg_UnregisterRegion, OnUnregisterRegion)
+  IPC_MESSAGE_HANDLER(GeofencingHostMsg_GetRegisteredRegions,
+                      OnGetRegisteredRegions)
+  IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+  return handled;
+}
+
+void GeofencingDispatcherHost::OnRegisterRegion(
+    int thread_id,
+    int request_id,
+    const std::string& region_id,
+    const blink::WebCircularGeofencingRegion& region) {
+  // Sanity check on region_id
+  if (region_id.length() > kMaxRegionIdLength) {
+    Send(new GeofencingMsg_RegisterRegionComplete(
+        thread_id, request_id, GeofencingStatus::GEOFENCING_STATUS_ERROR));
+    return;
+  }
+  // TODO(mek): Handle registration request.
+  Send(new GeofencingMsg_RegisterRegionComplete(
+      thread_id,
+      request_id,
+      GeofencingStatus::
+          GEOFENCING_STATUS_OPERATION_FAILED_SERVICE_NOT_AVAILABLE));
+}
+
+void GeofencingDispatcherHost::OnUnregisterRegion(
+    int thread_id,
+    int request_id,
+    const std::string& region_id) {
+  // Sanity check on region_id
+  if (region_id.length() > kMaxRegionIdLength) {

[palmer, 2014/10/02 18:24:00]

At some point, a unit test for this would be good. (Can come in a later CL.)

+    Send(new GeofencingMsg_UnregisterRegionComplete(
+        thread_id, request_id, GeofencingStatus::GEOFENCING_STATUS_ERROR));
+    return;
+  }
+  // TODO(mek): Handle unregistration request.
+  Send(new GeofencingMsg_UnregisterRegionComplete(
+      thread_id,
+      request_id,
+      GeofencingStatus::
+          GEOFENCING_STATUS_OPERATION_FAILED_SERVICE_NOT_AVAILABLE));
+}
+
+void GeofencingDispatcherHost::OnGetRegisteredRegions(int thread_id,
+                                                      int request_id) {
+  GeofencingRegistrations result;
+  Send(new GeofencingMsg_GetRegisteredRegionsComplete(
+      thread_id,
+      request_id,
+      GeofencingStatus::
+          GEOFENCING_STATUS_OPERATION_FAILED_SERVICE_NOT_AVAILABLE,
+      result));
+}
+
+}  // namespace content