Small cleanups in the Kernel FlowGraphBuilder

runtime/vm/kernel_reader.h

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef RUNTIME_VM_KERNEL_READER_H_
 #define RUNTIME_VM_KERNEL_READER_H_
 
 #if !defined(DART_PRECOMPILED_RUNTIME)
 #include <map>
 
 #include "vm/kernel.h"
 #include "vm/kernel_to_il.h"
 #include "vm/object.h"
 
 namespace dart {
 namespace kernel {
 
 class KernelReader;
 
 class BuildingTranslationHelper : public TranslationHelper {
  public:
-  BuildingTranslationHelper(KernelReader* reader,
-                            dart::Thread* thread,
-                            dart::Zone* zone,
-                            Isolate* isolate)
-      : TranslationHelper(thread, zone, isolate), reader_(reader) {}
+  BuildingTranslationHelper(KernelReader* reader, dart::Thread* thread)
+      : TranslationHelper(thread), reader_(reader) {}
   virtual ~BuildingTranslationHelper() {}
 
   virtual RawLibrary* LookupLibraryByKernelLibrary(Library* library);
   virtual RawClass* LookupClassByKernelClass(Class* klass);
 
  private:
   KernelReader* reader_;
 };
 
 template <typename KernelType, typename VmType>
@@ skipping 73 matching lines @@
 
   Mapping<Library, dart::Library> libraries_;
   Mapping<Class, dart::Class> classes_;
 };
 
 }  // namespace kernel
 }  // namespace dart
 
 #endif  // !defined(DART_PRECOMPILED_RUNTIME)
 #endif  // RUNTIME_VM_KERNEL_READER_H_