Revert "Add a hack to set shouldPaint to true for force-composited iframes."

third_party/WebKit/Source/core/paint/PaintLayer.h

Index: third_party/WebKit/Source/core/paint/PaintLayer.h
diff --git a/third_party/WebKit/Source/core/paint/PaintLayer.h b/third_party/WebKit/Source/core/paint/PaintLayer.h
index 94b67753b437c1d7e505d78658d2ea0a855a96b8..9d3694c8ad78cb68cde37eedd759d3b0880e4f28 100644
--- a/third_party/WebKit/Source/core/paint/PaintLayer.h
+++ b/third_party/WebKit/Source/core/paint/PaintLayer.h
@@ -240,10 +240,6 @@ public:
     // FIXME: Many people call this function while it has out-of-date information.
     bool isSelfPaintingLayer() const { return m_isSelfPaintingLayer; }
 
-    // PaintLayers which represent LayoutParts may become self-painting due to being composited.
-    // If this is the case, this method returns true.
-    bool isSelfPaintingOnlyBecauseIsCompositedPart() const;
-
     bool isTransparent() const { return layoutObject()->isTransparent() || layoutObject()->style()->hasBlendMode() || layoutObject()->hasMask(); }
 
     bool isReflection() const { return layoutObject()->isReplica(); }
@@ -793,8 +789,6 @@ private:
         m_needsPaintPhaseDescendantBlockBackgrounds |= layer.m_needsPaintPhaseDescendantBlockBackgrounds;
     }
 
-    bool isSelfPaintingLayerForIntrinsicOrScrollingReasons() const;
-
     bool shouldFragmentCompositedBounds(const PaintLayer* compositingLayer) const;
 
     // Self-painting layer is an optimization where we avoid the heavy Layer painting