Plug leaked mutexes in OptimizingCompilerThread.

BUG=
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/18345004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15414 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/optimizing-compiler-thread.h

@@ -83,8 +83,12 @@ class OptimizingCompilerThread : public Thread {
 #endif
 
   ~OptimizingCompilerThread() {
+    delete install_mutex_;
     delete input_queue_semaphore_;
     delete stop_semaphore_;
+#ifdef DEBUG
+    delete thread_id_mutex_;
+#endif
   }
 
  private: