Remove support for -webkit-line-clamp

Source/core/rendering/RenderLayer.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@web.de>
  *   Randall Jesup <rjesup@wgate.com>
@@ skipping 2140 matching lines @@
         delta.setHeight(0);
 
     scrollByRecursively(adjustedScrollDelta(delta), ScrollOffsetClamped);
 }
 
 void RenderLayer::scrollByRecursively(const IntSize& delta, ScrollOffsetClamping clamp)
 {
     if (delta.isZero())
         return;
 
-    bool restrictedByLineClamp = false;
-    if (renderer()->parent())
-        restrictedByLineClamp = !renderer()->parent()->style()->lineClamp().isNone();
-
-    if (renderer()->hasOverflowClip() && !restrictedByLineClamp) {
+    if (renderer()->hasOverflowClip()) {
         IntSize newScrollOffset = adjustedScrollOffset() + delta;
         m_scrollableArea->scrollToOffset(newScrollOffset, clamp);
 
         // If this layer can't do the scroll we ask the next layer up that can scroll to try
         IntSize remainingScrollOffset = newScrollOffset - adjustedScrollOffset();
         if (!remainingScrollOffset.isZero() && renderer()->parent()) {
             if (RenderLayer* scrollableLayer = enclosingScrollableLayer())
                 scrollableLayer->scrollByRecursively(remainingScrollOffset, clamp);
 
             Frame* frame = renderer()->frame();
@@ skipping 31 matching lines @@
     if (!page)
         return false;
     return !page->autoscrollInProgress();
 }
 
 void RenderLayer::scrollRectToVisible(const LayoutRect& rect, const ScrollAlignment& alignX, const ScrollAlignment& alignY)
 {
     RenderLayer* parentLayer = 0;
     LayoutRect newRect = rect;
 
-    bool restrictedByLineClamp = false;
-    if (renderer()->parent()) {
+    if (renderer()->parent())
         parentLayer = renderer()->parent()->enclosingLayer();
-        restrictedByLineClamp = !renderer()->parent()->style()->lineClamp().isNone();
-    }
 
-    if (renderer()->hasOverflowClip() && !restrictedByLineClamp) {
-        // Don't scroll to reveal an overflow layer that is restricted by the -webkit-line-clamp property.
-        // This will prevent us from revealing text hidden by the slider in Safari RSS.
+    if (renderer()->hasOverflowClip()) {
         RenderBox* box = renderBox();
         ASSERT(box);
         LayoutRect localExposeRect(box->absoluteToLocalQuad(FloatQuad(FloatRect(rect)), UseTransforms).boundingBox());
         LayoutRect layerBounds(0, 0, box->clientWidth(), box->clientHeight());
         LayoutRect r = getRectToExpose(layerBounds, localExposeRect, alignX, alignY);
 
         IntSize clampedScrollOffset = m_scrollableArea->clampScrollOffset(adjustedScrollOffset() + toIntSize(roundedIntRect(r).location()));
         if (clampedScrollOffset != adjustedScrollOffset()) {
             IntSize oldScrollOffset = adjustedScrollOffset();
             m_scrollableArea->scrollToOffset(clampedScrollOffset);
@@ skipping 3340 matching lines @@
     }
 }
 
 void showLayerTree(const WebCore::RenderObject* renderer)
 {
     if (!renderer)
         return;
     showLayerTree(renderer->enclosingLayer());
 }
 #endif