Inline some trivial functions in CompositingReasonFinder

Source/core/rendering/compositing/CompositingReasonFinder.h

Index: Source/core/rendering/compositing/CompositingReasonFinder.h
diff --git a/Source/core/rendering/compositing/CompositingReasonFinder.h b/Source/core/rendering/compositing/CompositingReasonFinder.h
index 28526bc9740bd167a36c0c2beb05f4d24a02470a..8cfe73fb3ded9fd61ac61c714e0b9a41ab6fd51f 100644
--- a/Source/core/rendering/compositing/CompositingReasonFinder.h
+++ b/Source/core/rendering/compositing/CompositingReasonFinder.h
@@ -35,16 +35,10 @@ private:
 
     CompositingReasons nonStyleDeterminedDirectReasons(const RenderLayer*, bool* needToRecomputeCompositingRequirements) const;
 
-    bool requiresCompositingForAnimation(RenderObject*) const;
     bool requiresCompositingForTransform(RenderObject*) const;
-    bool requiresCompositingForBackfaceVisibilityHidden(RenderObject*) const;
     bool requiresCompositingForFilters(RenderObject*) const;
-    bool requiresCompositingForOverflowScrollingParent(const RenderLayer*) const;
-    bool requiresCompositingForOutOfFlowClipping(const RenderLayer*) const;
-    bool requiresCompositingForOverflowScrolling(const RenderLayer*) const;
     bool requiresCompositingForPositionSticky(RenderObject*, const RenderLayer*) const;
     bool requiresCompositingForPositionFixed(RenderObject*, const RenderLayer*, RenderLayer::ViewportConstrainedNotCompositedReason*, bool* needToRecomputeCompositingRequirements) const;
-    bool requiresCompositingForWillChangeCompositingHint(const RenderObject*) const;
 
     RenderView& m_renderView;
     CompositingTriggerFlags m_compositingTriggers;