Skip PaintPhaseFloat if no floats in a layer

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 d98c72861c50325c9db9510eef9914e7854eba56..01976c602ab3080c1ff72d4997ba3a279e81da27 100644
--- a/third_party/WebKit/Source/core/paint/PaintLayer.h
+++ b/third_party/WebKit/Source/core/paint/PaintLayer.h
@@ -627,6 +627,10 @@ public:
     void setNeedsPaintPhaseDescendantOutlines() { ASSERT(isSelfPaintingLayer()); m_needsPaintPhaseDescendantOutlines = true; }
     void clearNeedsPaintPhaseDescendantOutlines() { ASSERT(isSelfPaintingLayer()); m_needsPaintPhaseDescendantOutlines = false; }
 
+    bool needsPaintPhaseFloat() const { return m_needsPaintPhaseFloat; }
+    void setNeedsPaintPhaseFloat() { ASSERT(isSelfPaintingLayer()); m_needsPaintPhaseFloat = true; }
+    void clearNeedsPaintPhaseFloat() { ASSERT(isSelfPaintingLayer()); m_needsPaintPhaseFloat = false; }
+
     PaintTiming* paintTiming();
 
 private:
@@ -760,6 +764,7 @@ private:
     unsigned m_previousPaintResult : 1; // PaintLayerPainter::PaintResult
 
     unsigned m_needsPaintPhaseDescendantOutlines : 1;
+    unsigned m_needsPaintPhaseFloat : 1;

[chrishtr, 2016/01/21 22:09:08]

Add a test like this one?

https://code.google.com/p/chromium/codesearch#chromium/src/third_party/WebKit...

[Xianzhu, 2016/01/21 23:58:35]

Done (https://codereview.chromium.org/1616193002/).

 
     LayoutBoxModelObject* m_layoutObject;