Remove custom signatures from V8 bindings

Source/bindings/v8/V8Binding.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009 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 119 matching lines @@
 
     // FIXME: Should pass in appropriate creationContext
     v8::Handle<v8::Object> filterWrapper = toV8(filter, v8::Handle<v8::Object>(), isolate).As<v8::Object>();
 
     RefPtr<NodeFilterCondition> condition = V8NodeFilterCondition::create(callback, filterWrapper, isolate);
     filter->setCondition(condition.release());
 
     return filter.release();
 }
 
+DOMWindow* toNativeDOMWindow(v8::Handle<v8::Value> value, v8::Isolate* isolate)
+{
+    if (value.IsEmpty() || !value->IsObject())
+        return 0;
+
+    v8::Handle<v8::Object> global = v8::Handle<v8::Object>::Cast(value);
+    v8::Handle<v8::Object> windowWrapper = global->FindInstanceInPrototypeChain(V8Window::domTemplate(isolate, worldType(isolate)));
+    if (windowWrapper.IsEmpty())
+        return 0;
+    return V8Window::toNative(windowWrapper);
+}
+
 const int32_t kMaxInt32 = 0x7fffffff;
 const int32_t kMinInt32 = -kMaxInt32 - 1;
 const uint32_t kMaxUInt32 = 0xffffffff;
 const int64_t kJSMaxInteger = 0x20000000000000LL - 1; // 2^53 - 1, maximum integer exactly representable in ECMAScript.
 
 static double enforceRange(double x, double minimum, double maximum, bool& ok)
 {
     if (std::isnan(x) || std::isinf(x)) {
         ok = false;
         return 0;
@@ skipping 489 matching lines @@
         return mainThreadIsolate();
     return v8::Isolate::GetCurrent();
 }
 
 v8::Isolate* toIsolate(Frame* frame)
 {
     return frame->script().isolate();
 }
 
 } // namespace WebCore