Remove the (already disabled) OverflowChangedEvent runtime flag

Source/core/frame/FrameView.cpp

Index: Source/core/frame/FrameView.cpp
diff --git a/Source/core/frame/FrameView.cpp b/Source/core/frame/FrameView.cpp
index c03e12774f169758fd811bd15a18466d8bdb0bc5..b6cdb4a69ea023472b57651e565e4f887e7cb070 100644
--- a/Source/core/frame/FrameView.cpp
+++ b/Source/core/frame/FrameView.cpp
@@ -36,7 +36,6 @@
 #include "core/dom/Fullscreen.h"
 #include "core/editing/FrameSelection.h"
 #include "core/editing/RenderedPosition.h"
-#include "core/events/OverflowEvent.h"
 #include "core/fetch/ResourceFetcher.h"
 #include "core/fetch/ResourceLoadPriorityOptimizer.h"
 #include "core/frame/FrameHost.h"
@@ -118,7 +117,6 @@ FrameView::FrameView(LocalFrame* frame)
     , m_isTransparent(false)
     , m_baseBackgroundColor(Color::white)
     , m_mediaType(MediaTypeNames::screen)
-    , m_overflowStatusDirty(true)
     , m_wasScrolledByUser(false)
     , m_safeToPropagateScrollToParent(true)
     , m_isTrackingPaintInvalidations(false)
@@ -1063,9 +1061,6 @@ void FrameView::layout()
     }
     updateAnnotatedRegions();
 
-    if (document->hasListenerType(Document::OVERFLOWCHANGED_LISTENER))
-        updateOverflowStatus(layoutSize().width() < contentsWidth(), layoutSize().height() < contentsHeight());
-
     scheduleOrPerformPostLayoutTasks();
 
     // FIXME: The notion of a single root for layout is no longer applicable. Remove or update this code. crbug.com/460596
@@ -2068,33 +2063,6 @@ void FrameView::updateCounters()
     }
 }
 
-void FrameView::updateOverflowStatus(bool horizontalOverflow, bool verticalOverflow)
-{
-    LayoutObject* viewport = viewportLayoutObject();
-    if (!viewport)
-        return;
-
-    if (m_overflowStatusDirty) {
-        m_horizontalOverflow = horizontalOverflow;
-        m_verticalOverflow = verticalOverflow;
-        m_overflowStatusDirty = false;
-        return;
-    }
-
-    bool horizontalOverflowChanged = (m_horizontalOverflow != horizontalOverflow);
-    bool verticalOverflowChanged = (m_verticalOverflow != verticalOverflow);
-
-    if (horizontalOverflowChanged || verticalOverflowChanged) {
-        m_horizontalOverflow = horizontalOverflow;
-        m_verticalOverflow = verticalOverflow;
-
-        RefPtrWillBeRawPtr<OverflowEvent> event = OverflowEvent::create(horizontalOverflowChanged, horizontalOverflow, verticalOverflowChanged, verticalOverflow);
-        event->setTarget(viewport->node());
-        m_frame->document()->enqueueAnimationFrameEvent(event.release());
-    }
-
-}
-
 IntRect FrameView::windowClipRect(IncludeScrollbarsInRect scrollbarInclusion) const
 {
     ASSERT(m_frame->view() == this);