[DevTools] Add additional accessor check in InjectedScriptSource.js

third_party/WebKit/Source/platform/v8_inspector/V8InjectedScriptHost.cpp

Index: third_party/WebKit/Source/platform/v8_inspector/V8InjectedScriptHost.cpp
diff --git a/third_party/WebKit/Source/platform/v8_inspector/V8InjectedScriptHost.cpp b/third_party/WebKit/Source/platform/v8_inspector/V8InjectedScriptHost.cpp
index af0a99d9003e1cc739b226463f7c4f8ac6916eff..64a4b5c5eea10841e24c3f0208c79f2c1ff5ff6e 100644
--- a/third_party/WebKit/Source/platform/v8_inspector/V8InjectedScriptHost.cpp
+++ b/third_party/WebKit/Source/platform/v8_inspector/V8InjectedScriptHost.cpp
@@ -67,9 +67,13 @@ void V8InjectedScriptHost::internalConstructorNameCallback(const v8::FunctionCal
 
 void V8InjectedScriptHost::formatAccessorsAsProperties(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
-    if (info.Length() < 1)
+    DCHECK_EQ(info.Length(), 2);
+    info.GetReturnValue().Set(false);
+    if (!info[1]->IsFunction())
+        return;
+    // Check that function is user-defined.
+    if (info[1].As<v8::Function>()->ScriptId() != v8::UnboundScript::kNoScriptId)
         return;
-
     info.GetReturnValue().Set(unwrapDebugger(info)->client()->formatAccessorsAsProperties(info[0]));
 }