Fire visibilityChange event on out-of-process iframes.

third_party/WebKit/Source/web/WebViewImpl.cpp

 /*
  * Copyright (C) 2011, 2012 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 450 matching lines @@
     MediaKeysController::provideMediaKeysTo(*m_page, &m_mediaKeysClientImpl);
     provideSpeechRecognitionTo(*m_page, SpeechRecognitionClientProxy::create(client ? client->speechRecognizer() : nullptr));
     provideContextFeaturesTo(*m_page, ContextFeaturesClientImpl::create());
     provideDatabaseClientTo(*m_page, DatabaseClientImpl::create());
 
     provideStorageQuotaClientTo(*m_page, StorageQuotaClientImpl::create());
     m_page->setValidationMessageClient(ValidationMessageClientImpl::create(*this));
     provideDedicatedWorkerGlobalScopeProxyProviderTo(*m_page, DedicatedWorkerGlobalScopeProxyProviderImpl::create());
     StorageNamespaceController::provideStorageNamespaceTo(*m_page, &m_storageClientImpl);
 
-    if (m_client) {
+    if (m_client)
         setVisibilityState(m_client->visibilityState(), true);
-    }
 
     initializeLayerTreeView();
 
     m_devToolsEmulator = DevToolsEmulator::create(this);
 
     allInstances().add(this);
 
     m_pageImportanceSignals.setObserver(client);
 }
 
@@ skipping 4069 matching lines @@
 {
     // TODO(oshima): Investigate if this should return the ScreenInfo's scale factor rather than
     // page's scale factor, which can be 1 in use-zoom-for-dsf mode.
     if (!page())
         return 1;
 
     return page()->deviceScaleFactor();
 }
 
 } // namespace blink