[debugger] infrastructure for side-effect-free debug-evaluate.

src/api-arguments.h

 // Copyright 2016 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_API_ARGUMENTS_H_
 #define V8_API_ARGUMENTS_H_
 
 #include "src/api.h"
 #include "src/isolate.h"
 
@@ skipping 118 matching lines @@
   inline Handle<Object> Call(IndexedPropertyDefinerCallback f, uint32_t index,
                              const v8::PropertyDescriptor& desc);
 
   inline void Call(AccessorNameSetterCallback f, Handle<Name> name,
                    Handle<Object> value);
 
  private:
   inline JSObject* holder() {
     return JSObject::cast(this->begin()[T::kHolderIndex]);
   }
+
+  bool PerformSideEffectCheck(Isolate* isolate, Address function);
 };
 
 class FunctionCallbackArguments
     : public CustomArguments<FunctionCallbackInfo<Value> > {
  public:
   typedef FunctionCallbackInfo<Value> T;
   typedef CustomArguments<T> Super;
   static const int kArgsLength = T::kArgsLength;
   static const int kHolderIndex = T::kHolderIndex;
   static const int kDataIndex = T::kDataIndex;
@@ skipping 40 matching lines @@
 
  private:
   internal::Object** argv_;
   int argc_;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_API_ARGUMENTS_H_