Remove m_hasBlendMode from BeginTransparencyDisplayItem

Source/core/paint/TransparencyDisplayItem.h

Index: Source/core/paint/TransparencyDisplayItem.h
diff --git a/Source/core/paint/TransparencyDisplayItem.h b/Source/core/paint/TransparencyDisplayItem.h
index dc87c5b2cdf67da845dfe1d4217c6c20c9d8bf78..290d916f0d37c830bc8643a72329522ab380c8fd 100644
--- a/Source/core/paint/TransparencyDisplayItem.h
+++ b/Source/core/paint/TransparencyDisplayItem.h
@@ -13,22 +13,21 @@ namespace blink {
 
 class BeginTransparencyDisplayItem : public DisplayItem {
 public:
-    BeginTransparencyDisplayItem(const RenderObject* renderer, Type type, const LayoutRect& clipRect, bool hasBlendMode, const WebBlendMode& blendMode, const float opacity)
+    BeginTransparencyDisplayItem(const RenderObject* renderer, Type type, const LayoutRect& clipRect, const WebBlendMode& blendMode, const float opacity)
         : DisplayItem(renderer, type)
         , m_clipRect(clipRect)
-        , m_hasBlendMode(hasBlendMode)
         , m_blendMode(blendMode)
         , m_opacity(opacity) { }
     virtual void replay(GraphicsContext*) override;
 
 private:
-
 #ifndef NDEBUG
     virtual WTF::String asDebugString() const override;
 #endif
 
+    bool hasBlendMode() const { return m_blendMode != WebBlendModeNormal; }
+
     const LayoutRect m_clipRect;
-    const bool m_hasBlendMode;
     const WebBlendMode m_blendMode;
     const float m_opacity;
 };