OverscrollGlow for mainThread-{BLINK CHANGES}

Source/core/loader/EmptyClients.h

Index: Source/core/loader/EmptyClients.h
diff --git a/Source/core/loader/EmptyClients.h b/Source/core/loader/EmptyClients.h
index e3408f02b7aba1e4d6c67590acff2a542841c7b5..e043270a8f53e0e3d7728416936dd72d73c8b3a4 100644
--- a/Source/core/loader/EmptyClients.h
+++ b/Source/core/loader/EmptyClients.h
@@ -39,6 +39,7 @@
 #include "core/page/Page.h"
 #include "core/page/SpellCheckerClient.h"
 #include "platform/DragImage.h"
+#include "platform/geometry/FloatPoint.h"
 #include "platform/geometry/IntRect.h"
 #include "platform/heap/Handle.h"
 #include "platform/network/ResourceError.h"
@@ -85,6 +86,8 @@ public:
     Page* createWindow(LocalFrame*, const FrameLoadRequest&, const WindowFeatures&, NavigationPolicy, ShouldSendReferrer) override { return nullptr; }
     void show(NavigationPolicy) override { }
 
+    void didOverscroll(const FloatSize&, const FloatSize&, const FloatPoint&, const FloatSize&) override { }
+
     void setToolbarsVisible(bool) override { }
     bool toolbarsVisible() override { return false; }