Revert of Enable fast/images with slimming paint

Source/core/paint/BoxPainter.cpp

Index: Source/core/paint/BoxPainter.cpp
diff --git a/Source/core/paint/BoxPainter.cpp b/Source/core/paint/BoxPainter.cpp
index 99926941043325b46783c8d48194132fb2eb90e7..152cb6cc691fe1f2aec53d1e0f06ff40e6458c91 100644
--- a/Source/core/paint/BoxPainter.cpp
+++ b/Source/core/paint/BoxPainter.cpp
@@ -11,7 +11,6 @@
 #include "core/paint/BackgroundImageGeometry.h"
 #include "core/paint/BoxDecorationData.h"
 #include "core/paint/DrawingRecorder.h"
-#include "core/paint/TransparencyDisplayItem.h"
 #include "core/rendering/ImageQualityController.h"
 #include "core/rendering/PaintInfo.h"
 #include "core/rendering/RenderBox.h"
@@ -516,7 +515,7 @@
 void BoxPainter::paintMaskImages(const PaintInfo& paintInfo, const LayoutRect& paintRect)
 {
     // Figure out if we need to push a transparency layer to render our mask.
-    OwnPtr<TransparencyRecorder> transparencyRecorder;
+    bool pushTransparencyLayer = false;
     bool compositedMask = m_renderBox.hasLayer() && m_renderBox.layer()->hasCompositedMask();
     bool flattenCompositingLayers = m_renderBox.view()->frameView() && m_renderBox.view()->frameView()->paintBehavior() & PaintBehaviorFlattenCompositingLayers;
     CompositeOperator compositeOp = CompositeSourceOver;
@@ -524,6 +523,7 @@
     bool allMaskImagesLoaded = true;
 
     if (!compositedMask || flattenCompositingLayers) {
+        pushTransparencyLayer = true;
         StyleImage* maskBoxImage = m_renderBox.style()->maskBoxImage().image();
         const FillLayer& maskLayers = m_renderBox.style()->maskLayers();
 
@@ -534,9 +534,7 @@
         allMaskImagesLoaded &= maskLayers.imagesAreLoaded();
 
         paintInfo.context->setCompositeOperation(CompositeDestinationIn);
-
-        transparencyRecorder = adoptPtr(new TransparencyRecorder(paintInfo.context, &m_renderBox, DisplayItem::BeginTransparency, WebBlendModeNormal, 1));
-
+        paintInfo.context->beginTransparencyLayer(1);
         compositeOp = CompositeSourceOver;
     }
 
@@ -544,6 +542,9 @@
         paintFillLayers(paintInfo, Color::transparent, m_renderBox.style()->maskLayers(), paintRect, BackgroundBleedNone, compositeOp);
         paintNinePieceImage(m_renderBox, paintInfo.context, paintRect, m_renderBox.style(), m_renderBox.style()->maskBoxImage(), compositeOp);
     }
+
+    if (pushTransparencyLayer)
+        paintInfo.context->endLayer();
 }
 
 void BoxPainter::paintClippingMask(const PaintInfo& paintInfo, const LayoutPoint& paintOffset)