Move rem handling out of CSSParserValues.cpp

Source/core/dom/TreeScopeStyleSheetCollection.cpp

Index: Source/core/dom/TreeScopeStyleSheetCollection.cpp
diff --git a/Source/core/dom/TreeScopeStyleSheetCollection.cpp b/Source/core/dom/TreeScopeStyleSheetCollection.cpp
index 93a42764f127816bf550ff57c50f3a480f8540ba..b0a0e3ff553b0194a575d7529277bcb602901ec9 100644
--- a/Source/core/dom/TreeScopeStyleSheetCollection.cpp
+++ b/Source/core/dom/TreeScopeStyleSheetCollection.cpp
@@ -42,7 +42,6 @@ namespace blink {
 TreeScopeStyleSheetCollection::TreeScopeStyleSheetCollection(TreeScope& treeScope)
     : m_treeScope(treeScope)
     , m_hadActiveLoadingStylesheet(false)
-    , m_usesRemUnits(false)
 {
 }
 
@@ -176,20 +175,6 @@ void TreeScopeStyleSheetCollection::clearMediaQueryRuleSetStyleSheets()
     }
 }
 
-static bool styleSheetsUseRemUnits(const WillBeHeapVector<RefPtrWillBeMember<CSSStyleSheet>>& sheets)
-{
-    for (unsigned i = 0; i < sheets.size(); ++i) {
-        if (sheets[i]->contents()->usesRemUnits())
-            return true;
-    }
-    return false;
-}
-
-void TreeScopeStyleSheetCollection::updateUsesRemUnits()
-{
-    m_usesRemUnits = styleSheetsUseRemUnits(m_activeAuthorStyleSheets);
-}
-
 DEFINE_TRACE(TreeScopeStyleSheetCollection)
 {
     visitor->trace(m_treeScope);