Use VisibilityState enum and move WebPageVisibilityState to public/platform.

Source/modules/serviceworkers/ServiceWorkerWindowClient.cpp

 // Copyright 2014 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 "config.h"
 #include "modules/serviceworkers/ServiceWorkerWindowClient.h"
 
 #include "bindings/core/v8/CallbackPromiseAdapter.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
+#include "core/page/PageVisibilityState.h"
 #include "core/page/WindowFocusAllowedIndicator.h"
 #include "modules/serviceworkers/ServiceWorkerError.h"
 #include "modules/serviceworkers/ServiceWorkerGlobalScopeClient.h"
 #include "public/platform/WebString.h"
 #include "wtf/RefPtr.h"
 
 namespace blink {
 
 ServiceWorkerWindowClient* ServiceWorkerWindowClient::create(const WebServiceWorkerClientInfo& info)
 {
     return new ServiceWorkerWindowClient(info);
 }
 
 ServiceWorkerWindowClient::ServiceWorkerWindowClient(const WebServiceWorkerClientInfo& info)
     : ServiceWorkerClient(info)
     , m_visibilityState(info.visibilityState)
+    , m_pageVisibilityState(info.pageVisibilityState)
     , m_isFocused(info.isFocused)
     , m_frameType(info.frameType)
 {
 }
 
 ServiceWorkerWindowClient::~ServiceWorkerWindowClient()
 {
 }
 
+String ServiceWorkerWindowClient::visibilityState() const
+{
+    // FIXME: temporary until m_pageVisibilityState is used in Chromium.
+    if (m_pageVisibilityState == WebPageVisibilityStateLast)
+        return m_visibilityState;
+    return pageVisibilityStateString(static_cast<PageVisibilityState>(m_pageVisibilityState));
+}
+
 String ServiceWorkerWindowClient::frameType() const
 {
     DEFINE_STATIC_LOCAL(const String, auxiliary, ("auxiliary"));
     DEFINE_STATIC_LOCAL(const String, nested, ("nested"));
     DEFINE_STATIC_LOCAL(const String, none, ("none"));
     DEFINE_STATIC_LOCAL(const String, topLevel, ("top-level"));
 
     switch (m_frameType) {
     case WebURLRequest::FrameTypeAuxiliary:
         return auxiliary;
@@ skipping 23 matching lines @@
     ServiceWorkerGlobalScopeClient::from(scriptState->executionContext())->focus(id(), new CallbackPromiseAdapter<bool, ServiceWorkerError>(resolver));
     return promise;
 }
 
 void ServiceWorkerWindowClient::trace(Visitor* visitor)
 {
     ServiceWorkerClient::trace(visitor);
 }
 
 } // namespace blink