Make FastNewFunctionContextStub take slots parameter

src/interface-descriptors.h

 // Copyright 2014 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_CALL_INTERFACE_DESCRIPTOR_H_
 #define V8_CALL_INTERFACE_DESCRIPTOR_H_
 
 #include "src/assembler.h"
 #include "src/macro-assembler.h"
 
@@ skipping 474 matching lines @@
 };
 
 class FastNewClosureDescriptor : public CallInterfaceDescriptor {
  public:
   DECLARE_DESCRIPTOR(FastNewClosureDescriptor, CallInterfaceDescriptor)
 };
 
 class FastNewFunctionContextDescriptor : public CallInterfaceDescriptor {
  public:
   DECLARE_DESCRIPTOR(FastNewFunctionContextDescriptor, CallInterfaceDescriptor)
-  enum ParameterIndices { kFunctionIndex, kContextIndex };
+
+  enum ParameterIndices { kFunctionIndex, kSlotsIndex, kContextIndex };
+  static const Register FunctionRegister();
+  static const Register SlotsRegister();
 };
 
 class FastNewObjectDescriptor : public CallInterfaceDescriptor {
  public:
   DECLARE_DESCRIPTOR(FastNewObjectDescriptor, CallInterfaceDescriptor)
 };
 
 class FastNewRestParameterDescriptor : public CallInterfaceDescriptor {
  public:
   DECLARE_DESCRIPTOR(FastNewRestParameterDescriptor, CallInterfaceDescriptor)
@@ skipping 436 matching lines @@
 }  // namespace v8
 
 
 #if V8_TARGET_ARCH_ARM64
 #include "src/arm64/interface-descriptors-arm64.h"
 #elif V8_TARGET_ARCH_ARM
 #include "src/arm/interface-descriptors-arm.h"
 #endif
 
 #endif  // V8_CALL_INTERFACE_DESCRIPTOR_H_