[NaCl SDK} Add EventListener and EventEmitter to support epoll.

native_client_sdk/src/libraries/sdk_util/scoped_ref.h

Index: native_client_sdk/src/libraries/sdk_util/scoped_ref.h
diff --git a/native_client_sdk/src/libraries/sdk_util/scoped_ref.h b/native_client_sdk/src/libraries/sdk_util/scoped_ref.h
index 841f12bb66ae01a403c98382559d771a3e14fa0d..57424d48948e7721d6b89f32638f6c7f6ec63cbc 100644
--- a/native_client_sdk/src/libraries/sdk_util/scoped_ref.h
+++ b/native_client_sdk/src/libraries/sdk_util/scoped_ref.h
@@ -70,6 +70,11 @@ class ScopedRef : public ScopedRefBase {
   T& operator*() const { return *get(); }
   T* operator->() const { return get(); }
 
+  // Provided for Map and Set
+  bool operator<(const ScopedRef& other) const {

[binji, 2013/07/17 22:23:20]

Now that I've seen the use case, you could just add this to EventInfo directly
(rather than add it for all RefObjects).

[noelallen1, 2013/07/18 22:18:16]

Done.

+    return ptr_ < other.ptr_;
+  }
+
  private:
   typedef void (ScopedRef::*bool_as_func_ptr)() const;
   void bool_as_func_impl() const {};