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

content/browser/device_orientation/device_data.h

Index: content/browser/device_orientation/device_data.h
diff --git a/content/browser/device_orientation/device_data.h b/content/browser/device_orientation/device_data.h
index ae65618ac25fae3c03c1b9056b6261f145af9a40..5ae0255562b826cb03b74113cb551740ae9fd041 100644
--- a/content/browser/device_orientation/device_data.h
+++ b/content/browser/device_orientation/device_data.h
@@ -18,9 +18,9 @@ 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;