ElementVisibilityObserver: remove OOPIF checks.

third_party/WebKit/Source/core/loader/EmptyClients.h

 /*
  * Copyright (C) 2006 Eric Seidel (eric@webkit.org)
  * Copyright (C) 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  * Copyright (C) 2012 Samsung Electronics. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
@@ skipping 12 matching lines @@
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef EmptyClients_h
 #define EmptyClients_h
 
 #include "core/CoreExport.h"
+#include "core/frame/RemoteFrameClient.h"
 #include "core/loader/FrameLoaderClient.h"
 #include "core/page/ChromeClient.h"
 #include "core/page/ContextMenuClient.h"
 #include "core/page/EditorClient.h"
 #include "core/page/Page.h"
 #include "core/page/SpellCheckerClient.h"
 #include "platform/DragImage.h"
 #include "platform/WebFrameScheduler.h"
 #include "platform/geometry/FloatPoint.h"
 #include "platform/geometry/FloatRect.h"
@@ skipping 373 matching lines @@
   WTF_MAKE_NONCOPYABLE(EmptyContextMenuClient);
   USING_FAST_MALLOC(EmptyContextMenuClient);
 
  public:
   EmptyContextMenuClient() {}
   ~EmptyContextMenuClient() override {}
   bool showContextMenu(const ContextMenu*, bool) override { return false; }
   void clearContextMenu() override {}
 };
 
+class CORE_EXPORT EmptyRemoteFrameClient
+    : NON_EXPORTED_BASE(public RemoteFrameClient) {
+  WTF_MAKE_NONCOPYABLE(EmptyRemoteFrameClient);
+
+ public:
+  EmptyRemoteFrameClient();
+
+  // RemoteFrameClient implementation.
+  void navigate(const ResourceRequest&,
+                bool shouldReplaceCurrentEntry) override {}
+  void reload(FrameLoadType, ClientRedirectPolicy) override {}
+  unsigned backForwardLength() override { return 0; }
+  void forwardPostMessage(MessageEvent*,
+                          PassRefPtr<SecurityOrigin> target,
+                          LocalFrame* sourceFrame) const override {}
+  void forwardInputEvent(Event*) override {}
+  void frameRectsChanged(const IntRect& frameRect) override {}
+  void updateRemoteViewportIntersection(
+      const IntRect& viewportIntersection) override {}
+  void advanceFocus(WebFocusType, LocalFrame* source) override {}
+  void visibilityChanged(bool visible) override {}
+  void setHasReceivedUserGesture() override {}
+
+  // FrameClient implementation.
+  bool inShadowTree() const override { return false; }
+  void willBeDetached() override {}
+  void detached(FrameDetachType) override {}
+  Frame* opener() const override { return nullptr; }
+  void setOpener(Frame*) override {}
+  Frame* parent() const override { return nullptr; }
+  Frame* top() const override { return nullptr; }
+  Frame* nextSibling() const override { return nullptr; }
+  Frame* firstChild() const override { return nullptr; }
+  void frameFocused() const override {}
+};
+
 CORE_EXPORT void fillWithEmptyClients(Page::PageClients&);
 
 }  // namespace blink
 
 #endif  // EmptyClients_h