Have bindings layer assume and insist that all interface types are GCed.

third_party/WebKit/Source/bindings/core/v8/ScriptWrappable.cpp

Index: third_party/WebKit/Source/bindings/core/v8/ScriptWrappable.cpp
diff --git a/third_party/WebKit/Source/bindings/core/v8/ScriptWrappable.cpp b/third_party/WebKit/Source/bindings/core/v8/ScriptWrappable.cpp
index 81c24eb0711183bd03fff278169c039b4af53845..3534a4ebfb5d2b1cd83854203e91f08945483b90 100644
--- a/third_party/WebKit/Source/bindings/core/v8/ScriptWrappable.cpp
+++ b/third_party/WebKit/Source/bindings/core/v8/ScriptWrappable.cpp
@@ -16,37 +16,10 @@ struct SameSizeAsScriptWrappable {
 
 static_assert(sizeof(ScriptWrappable) <= sizeof(SameSizeAsScriptWrappable), "ScriptWrappable should stay small");
 
-namespace {
-
-class ScriptWrappableProtector final {
-    WTF_MAKE_NONCOPYABLE(ScriptWrappableProtector);
-public:
-    ScriptWrappableProtector(ScriptWrappable* scriptWrappable, const WrapperTypeInfo* wrapperTypeInfo)
-        : m_scriptWrappable(scriptWrappable), m_wrapperTypeInfo(wrapperTypeInfo)
-    {
-        m_wrapperTypeInfo->refObject(m_scriptWrappable);
-    }
-    ~ScriptWrappableProtector()
-    {
-        m_wrapperTypeInfo->derefObject(m_scriptWrappable);
-    }
-
-private:
-    ScriptWrappable* m_scriptWrappable;
-    const WrapperTypeInfo* m_wrapperTypeInfo;
-};
-
-} // namespace
-
 v8::Local<v8::Object> ScriptWrappable::wrap(v8::Isolate* isolate, v8::Local<v8::Object> creationContext)
 {
     const WrapperTypeInfo* wrapperTypeInfo = this->wrapperTypeInfo();
 
-    // It's possible that no one except for the new wrapper owns this object at
-    // this moment, so we have to prevent GC to collect this object until the
-    // object gets associated with the wrapper.
-    ScriptWrappableProtector protect(this, wrapperTypeInfo);
-
     ASSERT(!DOMDataStore::containsWrapper(this, isolate));
 
     v8::Local<v8::Object> wrapper = V8DOMWrapper::createWrapper(isolate, creationContext, wrapperTypeInfo, this);