[inspector] gracefully handle stack overflows in the inspector.

src/inspector/java-script-call-frame.h

 /*
  * Copyright (c) 2010, Google Inc. 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
@@ skipping 37 matching lines @@
         new JavaScriptCallFrame(debuggerContext, callFrame));
   }
   ~JavaScriptCallFrame();
 
   int sourceID() const;
   int line() const;
   int column() const;
   int contextId() const;
 
   bool isAtReturn() const;
-  v8::Local<v8::Object> details() const;
+  v8::MaybeLocal<v8::Object> details() const;
 
   v8::MaybeLocal<v8::Value> evaluate(v8::Local<v8::Value> expression);
   v8::MaybeLocal<v8::Value> restart();
   v8::MaybeLocal<v8::Value> setVariableValue(int scopeNumber,
                                              v8::Local<v8::Value> variableName,
                                              v8::Local<v8::Value> newValue);
 
  private:
   JavaScriptCallFrame(v8::Local<v8::Context> debuggerContext,
                       v8::Local<v8::Object> callFrame);
 
   int callV8FunctionReturnInt(const char* name) const;
 
   v8::Isolate* m_isolate;
   v8::Global<v8::Context> m_debuggerContext;
   v8::Global<v8::Object> m_callFrame;
 
   DISALLOW_COPY_AND_ASSIGN(JavaScriptCallFrame);
 };
 
 using JavaScriptCallFrames = std::vector<std::unique_ptr<JavaScriptCallFrame>>;
 
 }  // namespace v8_inspector
 
 #endif  // V8_INSPECTOR_JAVASCRIPTCALLFRAME_H_