Use mayNotBeMainThread() for wrapper optimization

third_party/WebKit/Source/bindings/core/v8/V8Binding.h

 /*
 * Copyright (C) 2009 Google Inc. All rights reserved.
 * Copyright (C) 2012 Ericsson AB. 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.
@@ skipping 173 matching lines @@
 }
 
 template <typename CallbackInfo>
 inline void v8SetReturnValue(const CallbackInfo& callbackInfo,
                              ScriptWrappable* impl) {
   v8SetReturnValue(callbackInfo, impl, callbackInfo.Holder());
 }
 
 template <typename CallbackInfo>
 inline void v8SetReturnValue(const CallbackInfo& callbackInfo, Node* impl) {
-  if (UNLIKELY(!impl)) {
-    v8SetReturnValueNull(callbackInfo);
-    return;
-  }
-  if (DOMDataStore::setReturnValue(callbackInfo.GetReturnValue(), impl))
-    return;
-  v8::Local<v8::Object> wrapper = ScriptWrappable::fromNode(impl)->wrap(
-      callbackInfo.GetIsolate(), callbackInfo.Holder());
-  v8SetReturnValue(callbackInfo, wrapper);
+  v8SetReturnValue(callbackInfo, ScriptWrappable::fromNode(impl));
 }
 
 // Special versions for DOMWindow and EventTarget
 
 template <typename CallbackInfo>
 inline void v8SetReturnValue(const CallbackInfo& callbackInfo,
                              DOMWindow* impl) {
   v8SetReturnValue(callbackInfo, ToV8(impl, callbackInfo.Holder(),
                                       callbackInfo.GetIsolate()));
 }
@@ skipping 86 matching lines @@
     return;
   v8::Local<v8::Object> wrapper =
       impl->wrap(callbackInfo.GetIsolate(), callbackInfo.Holder());
   v8SetReturnValue(callbackInfo, wrapper);
 }
 
 template <typename CallbackInfo>
 inline void v8SetReturnValueFast(const CallbackInfo& callbackInfo,
                                  Node* impl,
                                  const ScriptWrappable* wrappable) {
-  if (UNLIKELY(!impl)) {
-    v8SetReturnValueNull(callbackInfo);
-    return;
-  }
-  if (DOMDataStore::setReturnValueFast(callbackInfo.GetReturnValue(), impl,
-                                       callbackInfo.Holder(), wrappable))
-    return;
-  v8::Local<v8::Object> wrapper = ScriptWrappable::fromNode(impl)->wrap(
-      callbackInfo.GetIsolate(), callbackInfo.Holder());
-  v8SetReturnValue(callbackInfo, wrapper);
+  v8SetReturnValueFast(callbackInfo, ScriptWrappable::fromNode(impl),
+                       wrappable);
 }
 
 // Special versions for DOMWindow and EventTarget
 
 template <typename CallbackInfo>
 inline void v8SetReturnValueFast(const CallbackInfo& callbackInfo,
                                  DOMWindow* impl,
                                  const ScriptWrappable*) {
   v8SetReturnValue(callbackInfo, ToV8(impl, callbackInfo.Holder(),
                                       callbackInfo.GetIsolate()));
@@ skipping 835 matching lines @@
 // If the argument isn't an object, this will crash.
 CORE_EXPORT v8::Local<v8::Value> freezeV8Object(v8::Local<v8::Value>,
                                                 v8::Isolate*);
 
 CORE_EXPORT v8::Local<v8::Value> fromJSONString(v8::Isolate*,
                                                 const String& stringifiedJSON,
                                                 ExceptionState&);
 }  // namespace blink
 
 #endif  // V8Binding_h