Revert of Remove support for thread-based recompilation

src/debug.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/v8.h"
 
 #include "src/api.h"
 #include "src/arguments.h"
 #include "src/bootstrapper.h"
 #include "src/code-stubs.h"
@@ skipping 1824 matching lines @@
 static inline bool HasDebugBreakSlots(Code* code) {
   return code->kind() == Code::FUNCTION && code->has_debug_break_slots();
 }
 
 
 void Debug::PrepareForBreakPoints() {
   // If preparing for the first break point make sure to deoptimize all
   // functions as debugging does not work with optimized code.
   if (!has_break_points_) {
     if (isolate_->concurrent_recompilation_enabled()) {
-      isolate_->optimizing_compile_dispatcher()->Flush();
+      isolate_->optimizing_compiler_thread()->Flush();
     }
 
     Deoptimizer::DeoptimizeAll(isolate_);
 
     Handle<Code> lazy_compile = isolate_->builtins()->CompileLazy();
 
     // There will be at least one break point when we are done.
     has_break_points_ = true;
 
     // Keep the list of activated functions in a handlified list as it
@@ skipping 1545 matching lines @@
   logger_->DebugEvent("Put", message.text());
 }
 
 
 void LockingCommandMessageQueue::Clear() {
   base::LockGuard<base::Mutex> lock_guard(&mutex_);
   queue_.Clear();
 }
 
 } }  // namespace v8::internal