Revert of Expand WTF::StringView's API to be more like StringPiece.

third_party/WebKit/Source/platform/text/mac/HyphenationMac.cpp

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "platform/text/Hyphenation.h"
 
 #include "wtf/RetainPtr.h"
 #include "wtf/text/StringView.h"
 
 namespace blink {
 
 class HyphenationCF : public Hyphenation {
 public:
     HyphenationCF(RetainPtr<CFLocaleRef>& localeCF)
         : m_localeCF(localeCF)
     {
         DCHECK(m_localeCF);
     }
 
     size_t lastHyphenLocation(const StringView& text, size_t beforeIndex) const override
     {
         CFIndex result = CFStringGetHyphenationLocationBeforeIndex(
-            text.toString().impl()->createCFString().get(), beforeIndex,
+            text.toString()->createCFString().get(), beforeIndex,
             CFRangeMake(0, text.length()), 0, m_localeCF.get(), 0);
         return result == kCFNotFound ? 0 : result;
     }
 
 private:
     RetainPtr<CFLocaleRef> m_localeCF;
 };
 
 PassRefPtr<Hyphenation> Hyphenation::platformGetHyphenation(const AtomicString& locale)
 {
     RetainPtr<CFStringRef> localeCFString = locale.impl()->createCFString();
     RetainPtr<CFLocaleRef> localeCF = adoptCF(CFLocaleCreate(kCFAllocatorDefault, localeCFString.get()));
     if (!CFStringIsHyphenationAvailableForLocale(localeCF.get()))
         return nullptr;
     return adoptRef(new HyphenationCF(localeCF));
 }
 
 } // namespace blink