[liveedit] reimplement frame restarting.

src/debug/liveedit.h

 // 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.
 
 #ifndef V8_DEBUG_LIVEEDIT_H_
 #define V8_DEBUG_LIVEEDIT_H_
 
 
 // Live Edit feature implementation.
 // User should be able to change script on already running VM. This feature
@@ skipping 56 matching lines @@
   int current_parent_index_;
 
   DISALLOW_COPY_AND_ASSIGN(LiveEditFunctionTracker);
 };
 
 
 class LiveEdit : AllStatic {
  public:
   static void InitializeThreadLocal(Debug* debug);
 
-  static bool SetAfterBreakTarget(Debug* debug);
-
   MUST_USE_RESULT static MaybeHandle<JSArray> GatherCompileInfo(
       Handle<Script> script,
       Handle<String> source);
 
   static void ReplaceFunctionCode(Handle<JSArray> new_compile_info_array,
                                   Handle<JSArray> shared_info_array);
 
   static void FixupScript(Handle<Script> script, int max_function_literal_id);
 
   static void FunctionSourceUpdated(Handle<JSArray> shared_info_array,
@@ skipping 264 matching lines @@
   static const int kSharedInfoOffset_ = 3;
   static const int kSize_ = 4;
 
   friend class JSArrayBasedStruct<SharedInfoWrapper>;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif /* V8_DEBUG_LIVEEDIT_H_ */