Rewrite of sigslot that avoids vtables.

webrtc/base/sigslot_unittest.cc

 /*
  *  Copyright 2012 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 85 matching lines @@
 
 typedef SigslotSlotTest<> SigslotSTSlotTest;
 typedef SigslotSlotTest<sigslot::multi_threaded_local,
                         sigslot::multi_threaded_local> SigslotMTSlotTest;
 
 class multi_threaded_local_fake : public sigslot::multi_threaded_local {
  public:
   multi_threaded_local_fake() : lock_count_(0), unlock_count_(0) {
   }
 
-  virtual void lock() {
-    ++lock_count_;
-  }
-  virtual void unlock() {
-    ++unlock_count_;
-  }
+  void lock() { ++lock_count_; }
+  void unlock() { ++unlock_count_; }
 
   int lock_count() { return lock_count_; }
 
   bool InCriticalSection() { return lock_count_ != unlock_count_; }
 
  protected:
   int lock_count_;
   int unlock_count_;
 };
 
@@ skipping 119 matching lines @@
   sigslot::signal0<>* signal = new sigslot::signal0<>;
   SigslotReceiver<>* receiver = new SigslotReceiver<>();
   receiver->Connect(signal);
   (*signal)();
   EXPECT_EQ(1, receiver->signal_count());
 
   delete receiver;
   (*signal)();
   delete signal;
 }