Rename PageLifecycleObserver to PageVisibilityObserver

third_party/WebKit/Source/modules/nfc/NFC.cpp

 // Copyright 2015 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 "modules/nfc/NFC.h"
 
 #include "bindings/core/v8/JSONValuesForV8.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "bindings/core/v8/V8ArrayBuffer.h"
 #include "core/dom/DOMArrayBuffer.h"
@@ skipping 420 matching lines @@
         originURL.setPath(message->url);
     }
 
     message->url = originURL;
     return originURL.isValid();
 }
 
 } // anonymous namespace
 
 NFC::NFC(LocalFrame* frame)
-    : PageLifecycleObserver(frame->page())
+    : PageVisibilityObserver(frame->page())
     , ContextLifecycleObserver(frame->document())
     , m_client(this)
 {
     ThreadState::current()->registerPreFinalizer(this);
     frame->serviceRegistry()->connectToRemoteService(mojo::GetProxy(&m_nfc));
     m_nfc.set_connection_error_handler(convertToBaseCallback(WTF::bind(&NFC::OnConnectionError, wrapWeakPersistent(this))));
     m_nfc->SetClient(m_client.CreateInterfacePtrAndBind());
 }
 
 NFC* NFC::create(LocalFrame* frame)
@@ skipping 122 matching lines @@
     m_requests.clear();
 }
 
 void NFC::OnWatch(mojo::WTFArray<uint32_t> ids, nfc::NFCMessagePtr)
 {
     // TODO(shalamov): Not implemented.
 }
 
 DEFINE_TRACE(NFC)
 {
-    PageLifecycleObserver::trace(visitor);
+    PageVisibilityObserver::trace(visitor);
     ContextLifecycleObserver::trace(visitor);
     visitor->trace(m_requests);
 }
 
 } // namespace blink