Replace usage of WebVector::isEmpty with WebVector::empty().

third_party/WebKit/Source/web/tests/WebFrameTest.cpp

 /*
  * Copyright (C) 2010 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 367 matching lines @@
       : m_didComplete(false), m_boolValue(false), m_context(context) {}
   ~ScriptExecutionCallbackHelper() {}
 
   bool didComplete() const { return m_didComplete; }
   const String& stringValue() const { return m_stringValue; }
   bool boolValue() { return m_boolValue; }
 
  private:
   void completed(const WebVector<v8::Local<v8::Value>>& values) override {
     m_didComplete = true;
-    if (!values.isEmpty()) {
+    if (!values.empty()) {
       if (values[0]->IsString()) {
         m_stringValue =
             toCoreString(values[0]->ToString(m_context).ToLocalChecked());
       } else if (values[0]->IsBoolean()) {
         m_boolValue = values[0].As<v8::Boolean>()->Value();
       }
     }
   }
 
   bool m_didComplete;
@@ skipping 11199 matching lines @@
   FrameTestHelpers::loadFrame(localFrame, "data:text/html,some page");
 
   // Local frame with remote parent should have transparent baseBackgroundColor.
   Color color = localFrame->frameView()->baseBackgroundColor();
   EXPECT_EQ(Color::transparent, color);
 
   view->close();
 }
 
 }  // namespace blink