Remove support for specifying the number of available threads

src/optimizing-compile-dispatcher.h

 // 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.
 
 #ifndef V8_OPTIMIZING_COMPILE_DISPATCHER_H_
 #define V8_OPTIMIZING_COMPILE_DISPATCHER_H_
 
 #include <queue>
 
 #include "src/base/atomicops.h"
@@ skipping 52 matching lines @@
     return input_queue_length_ < input_queue_capacity_;
   }
 
   inline void AgeBufferedOsrJobs() {
     // Advance cursor of the cyclic buffer to next empty slot or stale OSR job.
     // Dispose said OSR job in the latter case.  Calling this on every GC
     // should make sure that we do not hold onto stale jobs indefinitely.
     AddToOsrBuffer(NULL);
   }
 
-  static bool Enabled(int max_available) {
-    return (FLAG_concurrent_recompilation && max_available > 1);
-  }
+  static bool Enabled() { return FLAG_concurrent_recompilation; }
 
  private:
   class CompileTask;
 
   enum ModeFlag { COMPILE, FLUSH };
 
   void FlushOutputQueue(bool restore_function_code);
   void FlushOsrBuffer(bool restore_function_code);
   void CompileNext(OptimizedCompileJob* job);
   OptimizedCompileJob* NextInput(bool check_if_flushing = false);
@@ skipping 44 matching lines @@
   // background thread.
   //
   // Since flags might get modified while the background thread is running, it
   // is not safe to access them directly.
   int recompilation_delay_;
 };
 }
 }  // namespace v8::internal
 
 #endif  // V8_OPTIMIZING_COMPILE_DISPATCHER_H_