Fix AutoplayUmaHelper when autoplay is initiated from multiple sources

third_party/WebKit/Source/core/html/AutoplayUmaHelperTest.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 "core/html/AutoplayUmaHelper.h"
 
 #include "core/dom/Document.h"
 #include "core/html/HTMLMediaElement.h"
 #include "core/html/HTMLVideoElement.h"
 #include "core/testing/DummyPageHolder.h"
@@ skipping 52 matching lines @@
   void TearDown() override { m_umaHelper.clear(); }
 
   std::unique_ptr<DummyPageHolder> m_pageHolder;
   Persistent<MockAutoplayUmaHelper> m_umaHelper;
 };
 
 TEST_F(AutoplayUmaHelperTest, VisibilityChangeWhenUnload) {
   EXPECT_CALL(umaHelper(), handleContextDestroyed());
 
   mediaElement().setMuted(true);
-  umaHelper().onAutoplayInitiated(AutoplaySource::Attribute);
+  umaHelper().onAutoplayInitiated(AutoplaySource::Method);
   umaHelper().handlePlayingEvent();
   pageHolder().reset();
   ::testing::Mock::VerifyAndClear(&umaHelper());
 }
 
 }  // namespace blink