Cache contains only ascii in StringImpl

third_party/WebKit/Source/wtf/text/WTFString.h

Index: third_party/WebKit/Source/wtf/text/WTFString.h
diff --git a/third_party/WebKit/Source/wtf/text/WTFString.h b/third_party/WebKit/Source/wtf/text/WTFString.h
index d0382a01426a3d036922e3de9007f1b03c5e6b0a..162d94bbc0eabd63540a7c7f860c83564e389cfc 100644
--- a/third_party/WebKit/Source/wtf/text/WTFString.h
+++ b/third_party/WebKit/Source/wtf/text/WTFString.h
@@ -405,7 +405,9 @@ class WTF_EXPORT String {
                                       length);
   }
 
-  bool containsOnlyASCII() const;
+  bool containsOnlyASCII() const {
+    return !m_impl || m_impl->containsOnlyASCII();
+  }
   bool containsOnlyLatin1() const;
   bool containsOnlyWhitespace() const {
     return !m_impl || m_impl->containsOnlyWhitespace();
@@ -553,16 +555,6 @@ inline NSString* nsStringNilIfEmpty(const String& str) {
 }
 #endif
 
-inline bool String::containsOnlyASCII() const {
-  if (isEmpty())
-    return true;
-
-  if (is8Bit())
-    return charactersAreAllASCII(characters8(), m_impl->length());
-
-  return charactersAreAllASCII(characters16(), m_impl->length());
-}
-
 WTF_EXPORT int codePointCompare(const String&, const String&);
 
 inline bool codePointCompareLessThan(const String& a, const String& b) {