CSS Lazy Parsing perf jobs

third_party/WebKit/Source/core/css/parser/CSSTokenizer.h

Index: third_party/WebKit/Source/core/css/parser/CSSTokenizer.h
diff --git a/third_party/WebKit/Source/core/css/parser/CSSTokenizer.h b/third_party/WebKit/Source/core/css/parser/CSSTokenizer.h
index 005c2255a5ae0585c07ee17f4c5802a17387773a..5496a5ace1c592eecf573e6c3dd468581e231865 100644
--- a/third_party/WebKit/Source/core/css/parser/CSSTokenizer.h
+++ b/third_party/WebKit/Source/core/css/parser/CSSTokenizer.h
@@ -29,17 +29,24 @@ class CORE_EXPORT CSSTokenizer {
     DISALLOW_NEW();
 
    public:
+    Scope() {}
     Scope(const String&);
     Scope(const String&, CSSParserObserverWrapper&);  // For the inspector
 
     CSSParserTokenRange tokenRange();
     unsigned tokenCount();
 
+    std::unique_ptr<Vector<String>> releaseEscapedStrings() {
+      return std::move(m_stringPool);
+    }
+
    private:
-    void storeString(const String& string) { m_stringPool.append(string); }
+    void storeString(const String&);
     Vector<CSSParserToken, 32> m_tokens;
-    // We only allocate strings when escapes are used.
-    Vector<String> m_stringPool;
+
+    // We only allocate strings when escapes are used. This member is lazily
+    // initialized.
+    std::unique_ptr<Vector<String>> m_stringPool;
     String m_string;
 
     friend class CSSTokenizer;