DCHECK style is cacheable in ComputedStyle::CopyNonInheritedFromCached.

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 b5ab770317cabc093a7b0c1be6f5ba91342dfac2..ba02a3849ad153d66217000a32fc18022ac3753b 100644
--- a/third_party/WebKit/Source/core/style/ComputedStyle.cpp
+++ b/third_party/WebKit/Source/core/style/ComputedStyle.cpp
@@ -334,6 +334,8 @@ void ComputedStyle::InheritFrom(const ComputedStyle& inherit_parent,
 }
 
 void ComputedStyle::CopyNonInheritedFromCached(const ComputedStyle& other) {
+  DCHECK(MatchedPropertiesCache::IsStyleCacheable(other));
+
   ComputedStyleBase::CopyNonInheritedFromCached(other);
   rare_non_inherited_data_ = other.rare_non_inherited_data_;
 
@@ -352,13 +354,6 @@ void ComputedStyle::CopyNonInheritedFromCached(const ComputedStyle& other) {
   // Set correctly while computing style for children:
   // m_explicitInheritance
 
-  // unique() styles are not cacheable.
-  DCHECK(!other.Unique());
-
-  // styles with non inherited properties that reference variables are not
-  // cacheable.
-  DCHECK(!other.HasVariableReferenceFromNonInheritedProperty());
-
   // The following flags are set during matching before we decide that we get a
   // match in the MatchedPropertiesCache which in turn calls this method. The
   // reason why we don't copy these flags is that they're already correctly set
@@ -380,7 +375,6 @@ void ComputedStyle::CopyNonInheritedFromCached(const ComputedStyle& other) {
 
   if (svg_style_ != other.svg_style_)
     svg_style_.Access()->CopyNonInheritedFromCached(other.svg_style_.Get());
-  DCHECK_EQ(Zoom(), InitialZoom());
 }
 
 bool ComputedStyle::operator==(const ComputedStyle& o) const {