Add option to run ScopeIterator faster giving up nested scope chain.

src/runtime.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 477 matching lines @@
   F(DebugPropertyAttributesFromDetails, 1, 1) \
   F(DebugPropertyIndexFromDetails, 1, 1) \
   F(DebugNamedInterceptorPropertyValue, 2, 1) \
   F(DebugIndexedInterceptorElementValue, 2, 1) \
   F(CheckExecutionState, 1, 1) \
   F(GetFrameCount, 1, 1) \
   F(GetFrameDetails, 2, 1) \
   F(GetScopeCount, 2, 1) \
   F(GetStepInPositions, 2, 1) \
   F(GetScopeDetails, 4, 1) \
-  F(GetAllScopesDetails, 3, 1) \
+  F(GetAllScopesDetails, 4, 1) \
   F(GetFunctionScopeCount, 1, 1) \
   F(GetFunctionScopeDetails, 2, 1) \
   F(SetScopeVariableValue, 6, 1) \
   F(DebugPrintScopes, 0, 1) \
   F(GetThreadCount, 1, 1) \
   F(GetThreadDetails, 2, 1) \
   F(SetDisableBreak, 1, 1) \
   F(GetBreakLocations, 2, 1) \
   F(SetFunctionBreakPoint, 3, 1) \
   F(SetScriptBreakPoint, 4, 1) \
@@ skipping 361 matching lines @@
 class AllocateDoubleAlignFlag:  public BitField<bool,            0, 1> {};
 class AllocateTargetSpace:      public BitField<AllocationSpace, 1, 3> {};
 
 class DeclareGlobalsEvalFlag:   public BitField<bool,       0, 1> {};
 class DeclareGlobalsNativeFlag: public BitField<bool,       1, 1> {};
 class DeclareGlobalsStrictMode: public BitField<StrictMode, 2, 1> {};
 
 } }  // namespace v8::internal
 
 #endif  // V8_RUNTIME_H_