Implement java-side browser sensor polling for device motion and device orientation DOM events.

content/browser/device_orientation/device_data.h

 // Copyright (c) 2012 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_DEVICE_ORIENTATION_DEVICE_DATA_H_
 #define CONTENT_BROWSER_DEVICE_ORIENTATION_DEVICE_DATA_H_
 
 #include "base/memory/ref_counted.h"
 #include "content/common/content_export.h"
 
 namespace IPC {
 class Message;
 }
 
 namespace content {
 
 class CONTENT_EXPORT DeviceData :
     public base::RefCountedThreadSafe<DeviceData> {
  public:
   enum Type {
-    kTypeMotion,
-    kTypeOrientation,
-    kTypeTest
+    kTypeOrientation = 0,
+    kTypeMotion = 1,
+    kTypeTest = 100
   };
 
   virtual IPC::Message* CreateIPCMessage(int render_view_id) const = 0;
   virtual bool ShouldFireEvent(const DeviceData* other) const = 0;
 
  protected:
   DeviceData() {}
   virtual ~DeviceData() {}
 
  private:
   friend class base::RefCountedThreadSafe<DeviceData>;
 
   DISALLOW_COPY_AND_ASSIGN(DeviceData);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DEVICE_ORIENTATION_DEVICE_DATA_H_