Revert "Use Kernel frontend from run_vm_tests."

runtime/vm/kernel_isolate.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_ISOLATE_H_
 #define RUNTIME_VM_KERNEL_ISOLATE_H_
 
 #if !defined(DART_PRECOMPILED_RUNTIME)
 
 #include "include/dart_api.h"
 
 #include "vm/allocation.h"
 #include "vm/dart.h"
 #include "vm/os_thread.h"
 
 namespace dart {
 
 class KernelIsolate : public AllStatic {
  public:
   static const char* kName;
 
   static void Run();
 
   static bool Exists();
   static bool IsRunning();
   static bool IsKernelIsolate(const Isolate* isolate);
   static Dart_Port WaitForKernelPort();
   static Dart_Port KernelPort() { return kernel_port_; }
 
-  static Dart_KernelCompilationResult CompileToKernel(
-      const char* script_uri,
-      int source_files_count = 0,
-      Dart_SourceFile source_files[] = NULL);
+  static Dart_KernelCompilationResult CompileToKernel(const char* script_uri);
 
  protected:
   static Monitor* monitor_;
   static Dart_IsolateCreateCallback create_callback_;
 
   static void InitCallback(Isolate* I);
   static void SetKernelIsolate(Isolate* isolate);
   static void SetLoadPort(Dart_Port port);
   static void FinishedInitializing();
 
   static Dart_Port kernel_port_;
   static Isolate* isolate_;
   static bool initializing_;
 
   static Dart_IsolateCreateCallback create_callback() {
     return create_callback_;
   }
 
   friend class Dart;
   friend class RunKernelTask;
 };
 
 }  // namespace dart
 
 #endif  // DART_PRECOMPILED_RUNTIME
 
 #endif  // RUNTIME_VM_KERNEL_ISOLATE_H_