Compute snap offsets (both repeat and element based)

Source/core/frame/LocalFrame.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Simon Hausmann <hausmann@kde.org>
  *                     2000 Stefan Schimanski <1Stein@gmx.de>
  *                     2001 George Staikos <staikos@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2005 Alexey Proskuryakov <ap@nypop.com>
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
@@ skipping 43 matching lines @@
 #include "core/inspector/InstrumentingAgents.h"
 #include "core/layout/HitTestResult.h"
 #include "core/layout/LayoutView.h"
 #include "core/layout/compositing/DeprecatedPaintLayerCompositor.h"
 #include "core/loader/FrameLoadRequest.h"
 #include "core/loader/FrameLoaderClient.h"
 #include "core/loader/NavigationScheduler.h"
 #include "core/page/FocusController.h"
 #include "core/page/Page.h"
 #include "core/page/scrolling/ScrollingCoordinator.h"
+#include "core/page/scrolling/SnapCoordinator.h"
 #include "core/paint/DeprecatedPaintLayer.h"
 #include "core/paint/TransformRecorder.h"
 #include "core/svg/SVGDocumentExtensions.h"
 #include "platform/DragImage.h"
 #include "platform/PluginScriptForbiddenScope.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "platform/ScriptForbiddenScope.h"
 #include "platform/graphics/GraphicsContext.h"
 #include "platform/graphics/StaticBitmapImage.h"
 #include "platform/graphics/paint/ClipRecorder.h"
@@ skipping 136 matching lines @@
     visitor->trace(m_view);
     visitor->trace(m_domWindow);
     visitor->trace(m_pagePopupOwner);
     visitor->trace(m_script);
     visitor->trace(m_editor);
     visitor->trace(m_spellChecker);
     visitor->trace(m_selection);
     visitor->trace(m_eventHandler);
     visitor->trace(m_console);
     visitor->trace(m_inputMethodController);
+    visitor->trace(m_snapCoordinator);
     visitor->template registerWeakMembers<LocalFrame, &LocalFrame::clearWeakMembers>(this);
     HeapSupplementable<LocalFrame>::trace(visitor);
 #endif
     LocalFrameLifecycleNotifier::trace(visitor);
     Frame::trace(visitor);
 }
 
 DOMWindow* LocalFrame::domWindow() const
 {
     return m_domWindow.get();
@@ skipping 615 matching lines @@
     , m_editor(Editor::create(*this))
     , m_spellChecker(SpellChecker::create(*this))
     , m_selection(FrameSelection::create(this))
     , m_eventHandler(adoptPtrWillBeNoop(new EventHandler(this)))
     , m_console(FrameConsole::create(*this))
     , m_inputMethodController(InputMethodController::create(*this))
     , m_pageZoomFactor(parentPageZoomFactor(this))
     , m_textZoomFactor(parentTextZoomFactor(this))
     , m_inViewSourceMode(false)
 {
+    if (RuntimeEnabledFeatures::cssScrollSnapPointsEnabled())
+        m_snapCoordinator = SnapCoordinator::create(*this);

[esprehn, 2015/09/24 17:37:41]

This should be on FrameView.

[majidvp, 2015/10/15 21:47:02]

Following your other comment I moved it to document which I think is a more
appropriate owner. wdyt? 

+
     if (isLocalRoot())
         m_instrumentingAgents = InstrumentingAgents::create();
     else
         m_instrumentingAgents = localFrameRoot()->m_instrumentingAgents;
 }
 
 DEFINE_WEAK_IDENTIFIER_MAP(LocalFrame);
 
 } // namespace blink