Remove the CSS_COMPOSITING define, leaving the implementation under the runtime flag, since runtime…

Source/core/rendering/style/RenderStyle.h

Index: Source/core/rendering/style/RenderStyle.h
diff --git a/Source/core/rendering/style/RenderStyle.h b/Source/core/rendering/style/RenderStyle.h
index d9fc2c877596b52a597348ebcff05fce037958ba..bf32e1a423b9782ae22d83a68d3abd256071c40a 100644
--- a/Source/core/rendering/style/RenderStyle.h
+++ b/Source/core/rendering/style/RenderStyle.h
@@ -912,13 +912,9 @@ public:
     const FilterOperations& filter() const { return rareNonInheritedData->m_filter->m_operations; }
     bool hasFilter() const { return !rareNonInheritedData->m_filter->m_operations.operations().isEmpty(); }
 
-#if ENABLE(CSS_COMPOSITING)
-    BlendMode blendMode() const { return static_cast<BlendMode>(rareNonInheritedData->m_effectiveBlendMode); }
-    void setBlendMode(BlendMode v) { rareNonInheritedData.access()->m_effectiveBlendMode = v; }
-    bool hasBlendMode() const { return static_cast<BlendMode>(rareNonInheritedData->m_effectiveBlendMode) != BlendModeNormal; }
-#else
-    bool hasBlendMode() const { return false; }
-#endif
+    BlendMode blendMode() const;
+    void setBlendMode(BlendMode v);
+    bool hasBlendMode() const;
 
     bool shouldPlaceBlockDirectionScrollbarOnLogicalLeft() const { return !isLeftToRightDirection() && isHorizontalWritingMode(); }
 
@@ -1652,9 +1648,7 @@ public:
     static bool initialUseTouchOverflowScrolling() { return false; }
 #endif
     static const FilterOperations& initialFilter() { DEFINE_STATIC_LOCAL(FilterOperations, ops, ()); return ops; }
-#if ENABLE(CSS_COMPOSITING)
     static BlendMode initialBlendMode() { return BlendModeNormal; }
-#endif
 private:
     void setVisitedLinkColor(const Color&);
     void setVisitedLinkBackgroundColor(const Color& v) { SET_VAR(rareNonInheritedData, m_visitedLinkBackgroundColor, v); }