Remove redundant IsEmpty checks after calling toV8()

third_party/WebKit/Source/bindings/modules/v8/V8IDBObserverCallback.cpp

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "bindings/modules/v8/V8IDBObserverCallback.h"
 
 #include "bindings/core/v8/ScriptController.h"
 #include "bindings/core/v8/ToV8.h"
 #include "bindings/core/v8/V8Binding.h"
 #include "bindings/core/v8/V8PrivateProperty.h"
@@ skipping 26 matching lines @@
     ScriptState::Scope scope(m_scriptState.get());
 
     if (m_callback.isEmpty())
         return;
     v8::Local<v8::Value> observerHandle = toV8(&observer, m_scriptState->context()->Global(), m_scriptState->isolate());
     if (!observerHandle->IsObject())
         return;
 
     v8::Local<v8::Object> thisObject = v8::Local<v8::Object>::Cast(observerHandle);
     v8::Local<v8::Value> changesHandle = toV8(&changes, m_scriptState->context()->Global(), m_scriptState->isolate());
-    if (changesHandle.IsEmpty())
-        return;
-
     v8::Local<v8::Value> argv[] = { changesHandle };
 
     V8ScriptRunner::callFunction(m_callback.newLocal(m_scriptState->isolate()), m_scriptState->getExecutionContext(), thisObject, WTF_ARRAY_LENGTH(argv), argv, m_scriptState->isolate());
 }
 
 DEFINE_TRACE(V8IDBObserverCallback)
 {
     IDBObserverCallback::trace(visitor);
     ActiveDOMCallback::trace(visitor);
 }
 
 } // namespace blink