Rename StyleSheetCollections to StyleEngine.

Source/core/css/InspectorCSSOMWrappers.h

Index: Source/core/css/InspectorCSSOMWrappers.h
diff --git a/Source/core/css/InspectorCSSOMWrappers.h b/Source/core/css/InspectorCSSOMWrappers.h
index f97eea423e90d40d39261b5780fd1d38d90ded3d..fda87899fe7f74e5fd0c26201d788edbeda64feb 100644
--- a/Source/core/css/InspectorCSSOMWrappers.h
+++ b/Source/core/css/InspectorCSSOMWrappers.h
@@ -33,14 +33,14 @@ namespace WebCore {
 class CSSStyleRule;
 class CSSStyleSheet;
 class StyleRule;
-class StyleSheetCollections;
+class StyleEngine;
 class StyleSheetContents;
 
 class InspectorCSSOMWrappers {
 public:
     // WARNING. This will construct CSSOM wrappers for all style rules and cache them in a map for significant memory cost.
     // It is here to support inspector. Don't use for any regular engine functions.
-    CSSStyleRule* getWrapperForRuleInSheets(StyleRule*, StyleSheetCollections*);
+    CSSStyleRule* getWrapperForRuleInSheets(StyleRule*, StyleEngine*);
     void collectFromStyleSheetIfNeeded(CSSStyleSheet*);
     void reset();
 
@@ -50,7 +50,7 @@ private:
 
     void collectFromStyleSheetContents(HashSet<RefPtr<CSSStyleSheet> >& sheetWrapperSet, StyleSheetContents*);
     void collectFromStyleSheets(const Vector<RefPtr<CSSStyleSheet> >&);
-    void collectFromStyleSheetCollections(StyleSheetCollections*);
+    void collectFromStyleEngine(StyleEngine*);
 
     HashMap<StyleRule*, RefPtr<CSSStyleRule> > m_styleRuleToCSSOMWrapperMap;
     HashSet<RefPtr<CSSStyleSheet> > m_styleSheetCSSOMWrapperSet;