Add CoreLocation support to Chrome

chrome/browser/geolocation/core_location_data_provider_mac.h

+// Copyright (c) 2010 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.
+
+// This file declares a CoreLocation data provider class that allows the
+// CoreLocation framework to run on the UI thread, since the Geolocation API's
+// providers all live on the IO thread
+
+#ifndef CHROME_BROWSER_GEOLOCATION_CORE_LOCATION_DATA_PROVIDER_H_
+#define CHROME_BROWSER_GEOLOCATION_CORE_LOCATION_DATA_PROVIDER_H_
+#pragma once
+
+#include "base/ref_counted.h"
+#include "base/scoped_nsobject.h"
+#include "chrome/browser/chrome_thread.h"
+#include "chrome/common/geoposition.h"
+
+#import <Foundation/Foundation.h>
+
+class CoreLocationProviderMac;
+@class CoreLocationWrapperMac;
+
+// Data provider class that allows CoreLocation to run in Chrome's UI thread
+// while existing on any of Chrome's threads (in this case the IO thread)
+class CoreLocationDataProviderMac
+    : public base::RefCountedThreadSafe<CoreLocationDataProviderMac> {
+ public:
+  CoreLocationDataProviderMac();
+
+  bool StartUpdating(CoreLocationProviderMac* provider);
+  void StopUpdating();
+
+  void UpdatePosition(Geoposition *position);
+
+ protected:
+  friend class base::RefCountedThreadSafe<CoreLocationDataProviderMac>;
+  ~CoreLocationDataProviderMac();
+
+ private:
+  // These must execute in ChromeThread::UI
+  void StartUpdatingTask();
+  void StopUpdatingTask();
+  // This must execute in the origin thread (IO thread)
+  void PositionUpdated(Geoposition position);
+
+  // The wrapper class that supplies this class with position data
+  scoped_nsobject<CoreLocationWrapperMac> wrapper_;
+  // The LocationProviderBase class that should receive position data
+  CoreLocationProviderMac* provider_;
+  ChromeThread::ID origin_thread_id_;
+};
+
+#endif