[DevTools] Copy objects from debugger context to inspected context properly.

third_party/WebKit/Source/platform/v8_inspector/V8DebuggerAgentImpl.cpp

 // Copyright 2015 The Chromium 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 "platform/v8_inspector/V8DebuggerAgentImpl.h"
 
 #include "platform/v8_inspector/InjectedScript.h"
 #include "platform/v8_inspector/InspectedContext.h"
 #include "platform/v8_inspector/JavaScriptCallFrame.h"
 #include "platform/v8_inspector/RemoteObjectId.h"
@@ skipping 928 matching lines @@
             if (!injectedScript->wrapObjectProperty(errorString, details, toV8StringInternalized(m_isolate, "this"), backtraceObjectGroup))
                 return Array<CallFrame>::create();
             if (details->Has(debuggerContext, toV8StringInternalized(m_isolate, "returnValue")).FromMaybe(false)) {
                 if (!injectedScript->wrapObjectProperty(errorString, details, toV8StringInternalized(m_isolate, "returnValue"), backtraceObjectGroup))
                     return Array<CallFrame>::create();
             }
         } else {
             if (hasInternalError(errorString, !details->Set(debuggerContext, toV8StringInternalized(m_isolate, "scopeChain"), v8::Array::New(m_isolate, 0)).FromMaybe(false)))
                 return Array<CallFrame>::create();
             v8::Local<v8::Object> remoteObject = v8::Object::New(m_isolate);
+            if (!remoteObject->SetPrototype(debuggerContext, v8::Null(m_isolate)).FromMaybe(false))
+                return Array<CallFrame>::create();
             if (hasInternalError(errorString, !remoteObject->Set(debuggerContext, toV8StringInternalized(m_isolate, "type"), toV8StringInternalized(m_isolate, "undefined")).FromMaybe(false)))
                 return Array<CallFrame>::create();
             if (hasInternalError(errorString, !details->Set(debuggerContext, toV8StringInternalized(m_isolate, "this"), remoteObject).FromMaybe(false)))
                 return Array<CallFrame>::create();
             if (hasInternalError(errorString, !details->Delete(debuggerContext, toV8StringInternalized(m_isolate, "returnValue")).FromMaybe(false)))
                 return Array<CallFrame>::create();
         }
 
         if (hasInternalError(errorString, !objects->Set(debuggerContext, frameOrdinal, details).FromMaybe(false)))
             return Array<CallFrame>::create();
@@ skipping 199 matching lines @@
 {
     if (!enabled())
         return;
     m_scheduledDebuggerStep = NoStep;
     m_scripts.clear();
     m_blackboxedPositions.clear();
     m_breakpointIdToDebuggerBreakpointIds.clear();
 }
 
 } // namespace blink