[inspector] deduplicate stack frames

src/api.cc

 // Copyright 2012 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.
 
 #include "src/api.h"
 
 #include <string.h>  // For memcpy, strlen.
 #ifdef V8_USE_ADDRESS_SANITIZER
 #include <sanitizer/asan_interface.h>
 #endif  // V8_USE_ADDRESS_SANITIZER
@@ skipping 9681 matching lines @@
 debug::ConsoleCallArguments::ConsoleCallArguments(
     const v8::FunctionCallbackInfo<v8::Value>& info)
     : v8::FunctionCallbackInfo<v8::Value>(nullptr, info.values_, info.length_) {
 }
 
 debug::ConsoleCallArguments::ConsoleCallArguments(
     internal::BuiltinArguments& args)
     : v8::FunctionCallbackInfo<v8::Value>(nullptr, &args[0] - 1,
                                           args.length() - 1) {}
 
+int debug::GetStackFrameId(v8::Local<v8::StackFrame> frame) {
+  return Utils::OpenHandle(*frame)->id();
+}
+
 MaybeLocal<debug::Script> debug::GeneratorObject::Script() {
   i::Handle<i::JSGeneratorObject> obj = Utils::OpenHandle(this);
   i::Object* maybe_script = obj->function()->shared()->script();
   if (!maybe_script->IsScript()) return MaybeLocal<debug::Script>();
   i::Handle<i::Script> script(i::Script::cast(maybe_script), obj->GetIsolate());
   return ToApiHandle<debug::Script>(script);
 }
 
 Local<Function> debug::GeneratorObject::Function() {
   i::Handle<i::JSGeneratorObject> obj = Utils::OpenHandle(this);
@@ skipping 747 matching lines @@
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 }  // namespace internal
 }  // namespace v8