Make ComputedStyleBase a templated class to allow it to use functions on ComputedStyle

third_party/WebKit/Source/core/style/ComputedStyle.cpp

 /*
  * Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights
  * reserved.
  * Copyright (C) 2011 Adobe Systems Incorporated. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 63 matching lines @@
   struct ComputedStyleBase {
     void* data_refs[4];
     unsigned bitfields_[4];
   } base_;
 
   void* data_refs[3];
   void* own_ptrs[1];
   void* data_ref_svg_style;
 };
 
+// If this fails, the packing algorithm in make_computed_style_base.py has
+// failed to produce the optimal packed size. To fix, update the algorithm to
+// ensure that the buckets are placed so that each takes up at most 1 word.
+ASSERT_SIZE(ComputedStyleBase<ComputedStyle>, SameSizeAsComputedStyleBase);
+
 // If this assert fails, it means that size of ComputedStyle has changed. Please
 // check that you really *do* what to increase the size of ComputedStyle, then
 // update the SameSizeAsComputedStyle struct to match the updated storage of
 // ComputedStyle.
 ASSERT_SIZE(ComputedStyle, SameSizeAsComputedStyle);
 
 PassRefPtr<ComputedStyle> ComputedStyle::Create() {
   return AdoptRef(new ComputedStyle(InitialStyle()));
 }
 
@@ skipping 2424 matching lines @@
     if (value < 0)
       fvalue -= 0.5f;
     else
       fvalue += 0.5f;
   }
 
   return RoundForImpreciseConversion<int>(fvalue / zoom_factor);
 }
 
 }  // namespace blink