(DO NOT LAND) Revert of Generate StyleBackgroundData in ComputedStyleBase.

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 7c4e644cc623f5a4e0cfb0eab6db8e0dfbc34ac9..8440e967d80a6c07f217756695667f63a1db1455 100644
--- a/third_party/WebKit/Source/core/style/ComputedStyle.cpp
+++ b/third_party/WebKit/Source/core/style/ComputedStyle.cpp
@@ -116,6 +116,7 @@
     : ComputedStyleBase(), RefCounted<ComputedStyle>() {
   box_data_.Init();
   visual_data_.Init();
+  background_data_.Init();
   rare_non_inherited_data_.Init();
   rare_non_inherited_data_.Access()->deprecated_flexible_box_.Init();
   rare_non_inherited_data_.Access()->flexible_box_.Init();
@@ -137,6 +138,7 @@
       RefCounted<ComputedStyle>(),
       box_data_(o.box_data_),
       visual_data_(o.visual_data_),
+      background_data_(o.background_data_),
       rare_non_inherited_data_(o.rare_non_inherited_data_),
       rare_inherited_data_(o.rare_inherited_data_),
       inherited_data_(o.inherited_data_),
@@ -331,6 +333,7 @@
   ComputedStyleBase::CopyNonInheritedFromCached(other);
   box_data_ = other.box_data_;
   visual_data_ = other.visual_data_;
+  background_data_ = other.background_data_;
   rare_non_inherited_data_ = other.rare_non_inherited_data_;
 
   // The flags are copied one-by-one because they contain
@@ -472,6 +475,7 @@
   return ComputedStyleBase::NonInheritedEqual(other) &&
          box_data_ == other.box_data_ &&
          visual_data_ == other.visual_data_ &&
+         background_data_ == other.background_data_ &&
          rare_non_inherited_data_ == other.rare_non_inherited_data_ &&
          svg_style_->NonInheritedEqual(*other.svg_style_);
 }