Various OpenGLUI changes:

runtime/embedders/openglui/common/sound_handler.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef EMBEDDERS_OPENGLUI_COMMON_SOUND_HANDLER_H_
 #define EMBEDDERS_OPENGLUI_COMMON_SOUND_HANDLER_H_
 
 #include <stdint.h>
 #include <vector>
 
 #include "embedders/openglui/common/sample.h"
 
 class SoundHandler {
   public:
     SoundHandler();

[vsm, 2013/03/27 22:27:06]

Do you want to make this constructor private?  Is the intent to always call
instance() below?

 
     virtual ~SoundHandler() {
     }
 
     virtual int32_t Start() {
       return 0;
     }
 
     virtual void Stop() {
     }
@@ skipping 12 matching lines @@
 
     virtual void StopBackground() {
     }
 
     // Optional, for preloading.
     int32_t LoadSample(const char* path) {
        return (GetSample(path) == NULL) ? -1 : 0;
     }
 
     virtual int32_t PlaySample(const char* path) {
-      return 0;
+      // Just do a load so we can get logging.
+      return (GetSample(path) == NULL) ? -1 : 0;
     }
 
     static SoundHandler* instance() {
+      if (instance_ == NULL) {
+        return new SoundHandler();
+      }
       return instance_;
     }
 
   protected:
     typedef std::vector<Sample*> samples_t;
 
     Sample* GetSample(const char* path);
 
     samples_t samples_;
 
     static SoundHandler* instance_;
 };
 
 int32_t PlayBackgroundSound(const char* path);
 void StopBackgroundSound();
 int32_t LoadSoundSample(const char* path);
 int32_t PlaySoundSample(const char* path);
 
 #endif  // EMBEDDERS_OPENGLUI_COMMON_SOUND_HANDLER_H_