Replaced RefPtr::release with std::move in Source/wtf.

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

Index: third_party/WebKit/Source/wtf/text/StringBuffer.h
diff --git a/third_party/WebKit/Source/wtf/text/StringBuffer.h b/third_party/WebKit/Source/wtf/text/StringBuffer.h
index 2f8a4f9b5be028353a1a9adfa24e646d0cb0eb84..46b98cbcabc99a52786689a9496c2ee4e2c79820 100644
--- a/third_party/WebKit/Source/wtf/text/StringBuffer.h
+++ b/third_party/WebKit/Source/wtf/text/StringBuffer.h
@@ -64,7 +64,7 @@ class StringBuffer {
     return characters()[i];
   }
 
-  PassRefPtr<StringImpl> release() { return m_data.release(); }
+  PassRefPtr<StringImpl> release() { return std::move(m_data); }
 
  private:
   RefPtr<StringImpl> m_data;