Move String::remove to 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 f4e529e04ad32f520f34d46c544157a500435156..a76491fe4a861e5dd7664563630743e64baa37a7 100644
--- a/third_party/WebKit/Source/wtf/text/WTFString.h
+++ b/third_party/WebKit/Source/wtf/text/WTFString.h
@@ -255,7 +255,7 @@ public:
     void ensure16Bit();
 
     void truncate(unsigned len);
-    void remove(unsigned pos, int len = 1);
+    void remove(unsigned start, unsigned length = 1);
 
     String substring(unsigned pos, unsigned len = UINT_MAX) const;
     String left(unsigned len) const { return substring(0, len); }
@@ -374,9 +374,6 @@ private:
     operator UnspecifiedBoolType() const;
 
     template <typename CharacterType>
-    void removeInternal(const CharacterType*, unsigned, int);
-
-    template <typename CharacterType>
     void appendInternal(CharacterType);
 
     RefPtr<StringImpl> m_impl;