[inspector] deduplicate stack frames

src/debug/debug-interface.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_DEBUG_DEBUG_INTERFACE_H_
 #define V8_DEBUG_DEBUG_INTERFACE_H_
 
 #include <functional>
 
 #include "include/v8-debug.h"
@@ skipping 193 matching lines @@
   kObjectGetPrototypeOf,
   kObjectGetOwnPropertyDescriptor,
   kObjectGetOwnPropertyNames,
   kObjectGetOwnPropertySymbols,
 };
 
 Local<Function> GetBuiltin(Isolate* isolate, Builtin builtin);
 
 void SetConsoleDelegate(Isolate* isolate, ConsoleDelegate* delegate);
 
+int GetStackFrameId(v8::Local<v8::StackFrame> frame);
+
 /**
  * Native wrapper around v8::internal::JSGeneratorObject object.
  */
 class GeneratorObject {
  public:
   v8::MaybeLocal<debug::Script> Script();
   v8::Local<v8::Function> Function();
   debug::Location SuspendedLocation();
   bool IsSuspended();
 
@@ skipping 62 matching lines @@
   ~Coverage();
 
  private:
   explicit Coverage(i::Coverage* coverage) : coverage_(coverage) {}
   i::Coverage* coverage_;
 };
 }  // namespace debug
 }  // namespace v8
 
 #endif  // V8_DEBUG_DEBUG_INTERFACE_H_