DO NOT LAND. Revert of https://codereview.chromium.org/2797963002

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

Index: third_party/WebKit/Source/core/style/ComputedStyle.cpp
diff --git a/third_party/WebKit/Source/core/style/ComputedStyle.cpp b/third_party/WebKit/Source/core/style/ComputedStyle.cpp
index 181eb2a135b0593bfd69f06ab3e064c23cc2a75c..a8b1cb5fee2a1dd7f69f9a4e9c750ce6e461d7c6 100644
--- a/third_party/WebKit/Source/core/style/ComputedStyle.cpp
+++ b/third_party/WebKit/Source/core/style/ComputedStyle.cpp
@@ -78,6 +78,10 @@ struct SameSizeAsComputedStyle : public RefCounted<SameSizeAsComputedStyle> {
   void* data_refs[7];
   void* own_ptrs[1];
   void* data_ref_svg_style;
+
+  struct NonInheritedData {
+    unsigned m_bitfields[1];
+  } m_nonInheritedData;
 };
 
 // If this assert fails, it means that size of ComputedStyle has changed. Please
@@ -144,7 +148,8 @@ ALWAYS_INLINE ComputedStyle::ComputedStyle(const ComputedStyle& o)
       rare_non_inherited_data_(o.rare_non_inherited_data_),
       rare_inherited_data_(o.rare_inherited_data_),
       style_inherited_data_(o.style_inherited_data_),
-      svg_style_(o.svg_style_) {}
+      svg_style_(o.svg_style_),
+      m_nonInheritedData(o.m_nonInheritedData) {}
 
 static StyleRecalcChange DiffPseudoStyles(const ComputedStyle& old_style,
                                           const ComputedStyle& new_style) {