Rename PageLifecycleObserver to PageVisibilityObserver

third_party/WebKit/Source/core/page/Page.h

Index: third_party/WebKit/Source/core/page/Page.h
diff --git a/third_party/WebKit/Source/core/page/Page.h b/third_party/WebKit/Source/core/page/Page.h
index c22f2b0c1d501f9d371a2141cd52ad7041e6c97c..c073364ad85f02f41736792879a670925a67c46f 100644
--- a/third_party/WebKit/Source/core/page/Page.h
+++ b/third_party/WebKit/Source/core/page/Page.h
@@ -30,8 +30,8 @@
 #include "core/frame/UseCounter.h"
 #include "core/page/Page.h"
 #include "core/page/PageAnimator.h"
-#include "core/page/PageLifecycleNotifier.h"
-#include "core/page/PageLifecycleObserver.h"
+#include "core/page/PageVisibilityNotifier.h"
+#include "core/page/PageVisibilityObserver.h"
 #include "core/page/PageVisibilityState.h"
 #include "platform/Supplementable.h"
 #include "platform/Timer.h"
@@ -69,7 +69,7 @@ typedef uint64_t LinkHash;
 
 float deviceScaleFactor(LocalFrame*);
 
-class CORE_EXPORT Page final : public GarbageCollectedFinalized<Page>, public Supplementable<Page>, public PageLifecycleNotifier, public SettingsDelegate {
+class CORE_EXPORT Page final : public GarbageCollectedFinalized<Page>, public Supplementable<Page>, public PageVisibilityNotifier, public SettingsDelegate {
     USING_GARBAGE_COLLECTED_MIXIN(Page);
     WTF_MAKE_NONCOPYABLE(Page);
     friend class Settings;