Revert of Textarea resize-able only to larger; min-height and min-width properly set

Source/core/rendering/RenderLayerScrollableArea.cpp

Index: Source/core/rendering/RenderLayerScrollableArea.cpp
diff --git a/Source/core/rendering/RenderLayerScrollableArea.cpp b/Source/core/rendering/RenderLayerScrollableArea.cpp
index d674e47200dfddf95f6c38f83b97fddf8b711bf2..1ce4940b3cb30b0fcb5555a8dabad331be8a10e9 100644
--- a/Source/core/rendering/RenderLayerScrollableArea.cpp
+++ b/Source/core/rendering/RenderLayerScrollableArea.cpp
@@ -75,11 +75,6 @@ namespace WebCore {
 
 const int ResizerControlExpandRatioForTouch = 2;
 
-// Default value is set to 15 as the default
-// minimum size used by firefox is 15x15.
-static const int defaultMinimumWidthForResizing = 15;
-static const int defaultMinimumHeightForResizing = 15;
-
 RenderLayerScrollableArea::RenderLayerScrollableArea(RenderLayer& layer)
     : m_layer(layer)
     , m_inResizeMode(false)
@@ -715,16 +710,6 @@ static bool overflowDefinesAutomaticScrollbar(EOverflow overflow)
     return overflow == OAUTO || overflow == OOVERLAY;
 }
 
-IntSize RenderLayerScrollableArea::minimumSizeForResizing()
-{
-    int minimumWidth = intValueForLength(box().style()->logicalMinWidth(), box().containingBlock()->logicalWidth());
-    int minimumHeight = intValueForLength(box().style()->logicalMinHeight(), box().containingBlock()->logicalHeight());
-
-    minimumWidth = std::max(minimumWidth, defaultMinimumWidthForResizing);
-    minimumHeight = std::max(minimumHeight, defaultMinimumHeightForResizing);
-    return IntSize(minimumWidth, minimumHeight);
-}
-
 void RenderLayerScrollableArea::updateAfterStyleChange(const RenderStyle* oldStyle)
 {
     // List box parts handle the scrollbars by themselves so we have nothing to do.
@@ -1365,6 +1350,8 @@ void RenderLayerScrollableArea::resize(const PlatformEvent& evt, const LayoutSiz
     newOffset.setHeight(newOffset.height() / zoomFactor);
 
     LayoutSize currentSize = LayoutSize(box().width() / zoomFactor, box().height() / zoomFactor);
+    LayoutSize minimumSize = element->minimumSizeForResizing().shrunkTo(currentSize);
+    element->setMinimumSizeForResizing(minimumSize);
 
     LayoutSize adjustedOldOffset = LayoutSize(oldOffset.width() / zoomFactor, oldOffset.height() / zoomFactor);
     if (box().style()->shouldPlaceBlockDirectionScrollbarOnLogicalLeft()) {
@@ -1372,7 +1359,7 @@ void RenderLayerScrollableArea::resize(const PlatformEvent& evt, const LayoutSiz
         adjustedOldOffset.setWidth(-adjustedOldOffset.width());
     }
 
-    LayoutSize difference = (currentSize + newOffset - adjustedOldOffset).expandedTo(minimumSizeForResizing()) - currentSize;
+    LayoutSize difference = (currentSize + newOffset - adjustedOldOffset).expandedTo(minimumSize) - currentSize;
 
     bool isBoxSizingBorder = box().style()->boxSizing() == BORDER_BOX;