Various OpenGLUI changes:

runtime/embedders/openglui/common/sound_handler.cc

 // 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.
 
 #include "embedders/openglui/common/sound_handler.h"
 
 #include <string.h>
 
 #include "embedders/openglui/common/log.h"
 
 SoundHandler* SoundHandler::instance_ = NULL;
 
 SoundHandler::SoundHandler()
     : samples_() {
+  instance_ = this;
 }
 
 Sample* SoundHandler::GetSample(const char* path) {
   for (samples_t::iterator sp = samples_.begin();
        sp != samples_.end();
        ++sp) {
     Sample* sample = (*sp);
     if (strcmp(sample->path(), path) == 0) {
+      LOGI("Returning cached sample %s", path);
       return sample;
     }
   }
   Sample* sample = new Sample(path);
   if (sample->Load() != 0) {
     LOGI("Failed to load sample %s", path);
     delete sample;
     return NULL;
   }
   samples_.push_back(sample);
+  LOGI("Adding sample %s to cache", path);
   return sample;
 }
 
 int32_t PlayBackgroundSound(const char* path) {
   return SoundHandler::instance()->PlayBackground(path);
 }
 
 void StopBackgroundSound() {
   SoundHandler::instance()->StopBackground();
 }
 
 int32_t LoadSoundSample(const char* path) {
   return SoundHandler::instance()->LoadSample(path);
 }
 
 int32_t PlaySoundSample(const char* path) {
   return SoundHandler::instance()->PlaySample(path);
 }