Supports "class string" based on @@toStringTag.

third_party/WebKit/Source/bindings/core/v8/custom/V8WindowCustom.cpp

Index: third_party/WebKit/Source/bindings/core/v8/custom/V8WindowCustom.cpp
diff --git a/third_party/WebKit/Source/bindings/core/v8/custom/V8WindowCustom.cpp b/third_party/WebKit/Source/bindings/core/v8/custom/V8WindowCustom.cpp
index ff53c3dc8548f014d6c360f8c1dc243a343867e9..b3ba78a7fde9ac2762753c036f8fd74e9bbf4c82 100644
--- a/third_party/WebKit/Source/bindings/core/v8/custom/V8WindowCustom.cpp
+++ b/third_party/WebKit/Source/bindings/core/v8/custom/V8WindowCustom.cpp
@@ -218,19 +218,6 @@ void V8Window::postMessageMethodCustom(const v8::FunctionCallbackInfo<v8::Value>
     exceptionState.throwIfNeeded();
 }
 
-// FIXME(fqian): returning string is cheating, and we should
-// fix this by calling toString function on the receiver.
-// However, V8 implements toString in JavaScript, which requires
-// switching context of receiver. I consider it is dangerous.
-void V8Window::toStringMethodCustom(const v8::FunctionCallbackInfo<v8::Value>& info)
-{
-    v8::Local<v8::Object> domWrapper = V8Window::findInstanceInPrototypeChain(info.This(), info.GetIsolate());
-    v8::Local<v8::Object> target = domWrapper.IsEmpty() ? info.This() : domWrapper;
-    v8::Local<v8::String> value;
-    if (target->ObjectProtoToString(info.GetIsolate()->GetCurrentContext()).ToLocal(&value))
-        v8SetReturnValue(info, value);
-}
-
 void V8Window::openMethodCustom(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     DOMWindow* impl = V8Window::toImpl(info.Holder());