"up-to-date" should only use hyphens when used as compound modifier of a noun

pdf/paint_aggregator.h

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef PDF_PAINT_AGGREGATOR_H_
 #define PDF_PAINT_AGGREGATOR_H_
 
 #include <vector>
 
 #include "ppapi/cpp/image_data.h"
@@ skipping 72 matching lines @@
 
  private:
   // This structure is an internal version of PaintUpdate. It's different in
   // two respects:
   //
   //  - The scroll damange (area exposed by the scroll operation, if any) is
   //    maintained separately from the dirty rects generated by calling
   //    InvalidateRect. We need to know this distinction for some operations.
   //
   //  - The paint bounds union is computed on the fly so we don't have to keep
-  //    a rectangle up-to-date as we do different operations.
+  //    a rectangle up to date as we do different operations.
   class InternalPaintUpdate {
    public:
     InternalPaintUpdate();
     ~InternalPaintUpdate();
 
     // Computes the rect damaged by scrolling within |scroll_rect| by
     // |scroll_delta|. This rect must be repainted. It is not included in
     // paint_rects.
     pp::Rect GetScrollDamage() const;
 
@@ skipping 17 matching lines @@
 
   // Internal method used by InvalidateRect. If |check_scroll| is true, then the
   // method checks if there's a pending scroll and if so also invalidates |rect|
   // in the new scroll position.
   void InvalidateRectInternal(const pp::Rect& rect, bool check_scroll);
 
   InternalPaintUpdate update_;
 };
 
 #endif  // PDF_PAINT_AGGREGATOR_H_