[compiler] Slightly change API to finalize compile jobs.

src/optimizing-compile-dispatcher.cc

 // Copyright 2012 the V8 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.
 
 #include "src/optimizing-compile-dispatcher.h"
 
 #include "src/base/atomicops.h"
 #include "src/full-codegen/full-codegen.h"
 #include "src/isolate.h"
 #include "src/tracing/trace-event.h"
@@ skipping 180 matching lines @@
     CompilationInfo* info = job->info();
     Handle<JSFunction> function(*info->closure());
     if (function->IsOptimized()) {
       if (FLAG_trace_concurrent_recompilation) {
         PrintF("  ** Aborting compilation for ");
         function->ShortPrint();
         PrintF(" as it has already been optimized.\n");
       }
       DisposeOptimizedCompileJob(job, false);
     } else {
-      MaybeHandle<Code> code = Compiler::GetConcurrentlyOptimizedCode(job);
-      function->ReplaceCode(code.is_null() ? function->shared()->code()
-                                           : *code.ToHandleChecked());
+      Compiler::FinalizeOptimizedCompileJob(job);
     }
   }
 }
 
 
 void OptimizingCompileDispatcher::QueueForOptimization(
     OptimizedCompileJob* job) {
   DCHECK(IsQueueAvailable());
   {
     // Add job to the back of the input queue.
@@ skipping 15 matching lines @@
   while (blocked_jobs_ > 0) {
     V8::GetCurrentPlatform()->CallOnBackgroundThread(
         new CompileTask(isolate_), v8::Platform::kShortRunningTask);
     blocked_jobs_--;
   }
 }
 
 
 }  // namespace internal
 }  // namespace v8