Actually increment queue length for parallel recompile queue.

R=jkummerow@chromium.org
BUG=

Review URL: https://chromiumcodereview.appspot.com/12039088

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@13521 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/optimizing-compiler-thread.cc

@@ -135,6 +135,8 @@ Handle<SharedFunctionInfo>
 
 void OptimizingCompilerThread::QueueForOptimization(
     OptimizingCompiler* optimizing_compiler) {
+  ASSERT(IsQueueAvailable());
+  Barrier_AtomicIncrement(&queue_length_, static_cast<Atomic32>(1));
   input_queue_.Enqueue(optimizing_compiler);
   input_queue_semaphore_->Signal();
 }