Remove the (already disabled) OverflowChangedEvent runtime flag

Source/core/frame/FrameView.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Dirk Mueller <mueller@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *           (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
@@ skipping 18 matching lines @@
 
 #include "core/HTMLNames.h"
 #include "core/MediaTypeNames.h"
 #include "core/css/FontFaceSet.h"
 #include "core/css/resolver/StyleResolver.h"
 #include "core/dom/AXObjectCache.h"
 #include "core/dom/DocumentMarkerController.h"
 #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"
 #include "core/frame/LocalFrame.h"
 #include "core/frame/Settings.h"
 #include "core/html/HTMLFrameElement.h"
 #include "core/html/HTMLPlugInElement.h"
 #include "core/html/HTMLTextFormControlElement.h"
 #include "core/html/parser/TextResourceDecoder.h"
 #include "core/input/EventHandler.h"
@@ skipping 61 matching lines @@
     , m_displayMode(WebDisplayModeBrowser)
     , m_canHaveScrollbars(true)
     , m_slowRepaintObjectCount(0)
     , m_hasPendingLayout(false)
     , m_inSynchronousPostLayout(false)
     , m_postLayoutTasksTimer(this, &FrameView::postLayoutTimerFired)
     , m_updateWidgetsTimer(this, &FrameView::updateWidgetsTimerFired)
     , m_isTransparent(false)
     , m_baseBackgroundColor(Color::white)
     , m_mediaType(MediaTypeNames::screen)
-    , m_overflowStatusDirty(true)
     , m_wasScrolledByUser(false)
     , m_safeToPropagateScrollToParent(true)
     , m_isTrackingPaintInvalidations(false)
     , m_scrollCorner(nullptr)
     , m_inputEventsScaleFactorForEmulation(1)
     , m_layoutSizeFixedToFrameSize(true)
     , m_didScrollTimer(this, &FrameView::didScrollTimerFired)
     , m_topControlsViewportAdjustment(0)
     , m_needsUpdateWidgetPositions(false)
 #if ENABLE(ASSERT)
@@ skipping 924 matching lines @@
 
     m_layoutCount++;
 
     if (AXObjectCache* cache = document->axObjectCache()) {
         const KURL& url = document->url();
         if (url.isValid() && !url.isAboutBlankURL())
             cache->handleLayoutComplete(document);
     }
     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
     TRACE_EVENT_END1("devtools.timeline", "Layout", "endData", InspectorLayoutEvent::endData(rootForThisLayout));
     InspectorInstrumentation::didLayout(m_frame.get());
 
     m_nestedLayoutCount--;
     if (m_nestedLayoutCount)
         return;
 
@@ skipping 982 matching lines @@
         return;
 
     for (LayoutObject* layoutObject = view; layoutObject; layoutObject = layoutObject->nextInPreOrder()) {
         if (!layoutObject->isCounter())
             continue;
 
         toLayoutCounter(layoutObject)->updateCounter();
     }
 }
 
-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);
 
     // Set our clip rect to be our contents.
     IntRect clipRect = contentsToRootFrame(visibleContentRect(scrollbarInclusion));
     if (!m_frame->deprecatedLocalOwner())
         return clipRect;
 
     // Take our owner element and get its clip rect.
@@ skipping 1875 matching lines @@
 
     if (!graphicsLayer)
         return;
 
     DeprecatedPaintLayer::mapRectToPaintInvalidationBacking(localFrame->contentLayoutObject(), paintInvalidationContainer, viewRect);
 
     graphicsLayerTimingRequests.add(graphicsLayer, Vector<std::pair<int64_t, WebRect>>()).storedValue->value.append(std::make_pair(m_frame->frameID(), enclosingIntRect(viewRect)));
 }
 
 } // namespace blink