Partially convert geolocation IPC to Mojo.

content/browser/geolocation/geolocation_service_impl_context.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 CONTENT_BROWSER_GEOLOCATION_GEOLOCATION_SERVICE_IMPL_CONTEXT_H_
+#define CONTENT_BROWSER_GEOLOCATION_GEOLOCATION_SERVICE_IMPL_CONTEXT_H_
+
+#include <list>
+
+namespace content {
+class GeolocationServiceImpl;
+
+// Provides information to a set of GeolocationServiceImpl instances that are
+// associated with a given context. Notably, allows pausing and resuming
+// geolocation on these instances.
+class GeolocationServiceImplContext {
+ public:
+  GeolocationServiceImplContext();
+  virtual ~GeolocationServiceImplContext();
+
+  // Adds and removes a service to this context.
+  void AddService(GeolocationServiceImpl* service);
+  void RemoveService(GeolocationServiceImpl* service);
+
+  // Pauses and resumes geolocation. Resuming when nothing is paused is a
+  // no-op. If a service is added while geolocation is paused, that service
+  // will not get geolocation updates until geolocation is resumed.
+  void PauseUpdates();
+  void ResumeUpdates();
+
+  // Returns whether geolocation updates are currently paused.
+  bool paused() { return paused_; }

[qsr, 2014/10/07 13:03:59]

Could you tell me who is using this?

[blundell, 2014/10/07 14:35:24]

GeolocationServiceImpl::OnLocationUpdate(). If we move the the Android impl to
Java, the whole infrastructure around pausing/resuming would move to Java as
well - it's used only on Android and kicked off by a call into AwContents from
Java.

+
+ private:
+  std::list<GeolocationServiceImpl*> attached_services_;
+  bool paused_;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_GEOLOCATION_GEOLOCATION_SERVICE_IMPL_CONTEXT_H_