Attempt to make it more clear what FloatIntervalSearchAdaptor::collectIfNeeded is doing.

Source/core/rendering/RenderBlock.h

Index: Source/core/rendering/RenderBlock.h
diff --git a/Source/core/rendering/RenderBlock.h b/Source/core/rendering/RenderBlock.h
index f21bd95ab0b2d1d4f627689b9677170452352e68..06300e892bb4b4e7c19f4ab1b45816a955a21822 100644
--- a/Source/core/rendering/RenderBlock.h
+++ b/Source/core/rendering/RenderBlock.h
@@ -1191,6 +1191,8 @@ protected:
         const FloatingObject* lastFloat() const { return m_last; }
 
     private:
+        bool updateOffsetIfNeeded(const FloatingObject*) const;
+
         const RenderBlock* m_renderer;
         int m_lowValue;
         int m_highValue;