Add std::string constructors for Origin/SchemeHostPort to reduce copies

url/scheme_host_port.cc

 // Copyright 2015 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 "url/scheme_host_port.h"
 
 #include <stdint.h>
 #include <string.h>
 
 #include <tuple>
@@ skipping 98 matching lines @@
       NOTREACHED();
       return false;
   }
 }
 
 }  // namespace
 
 SchemeHostPort::SchemeHostPort() : port_(0) {
 }
 
-SchemeHostPort::SchemeHostPort(base::StringPiece scheme,
-                               base::StringPiece host,
+SchemeHostPort::SchemeHostPort(std::string scheme,
+                               std::string host,
                                uint16_t port,
                                ConstructPolicy policy)
     : port_(0) {
   if (!IsValidInput(scheme, host, port, policy))
     return;
 
-  scheme.CopyToString(&scheme_);
-  host.CopyToString(&host_);
+  scheme_ = std::move(scheme);
+  host_ = std::move(host);
   port_ = port;
 }
 
 SchemeHostPort::SchemeHostPort(base::StringPiece scheme,
                                base::StringPiece host,
                                uint16_t port)
-    : SchemeHostPort(scheme,
-                     host,
+    : SchemeHostPort(scheme.as_string(),
+                     host.as_string(),
                      port,
                      ConstructPolicy::CHECK_CANONICALIZATION) {}
 
 SchemeHostPort::SchemeHostPort(const GURL& url) : port_(0) {
   if (!url.is_valid())
     return;
 
   base::StringPiece scheme = url.scheme_piece();
   base::StringPiece host = url.host_piece();
 
@@ skipping 83 matching lines @@
     result.push_back(':');
     std::string port(base::UintToString(port_));
     parsed->port = Component(result.length(), port.length());
     result.append(std::move(port));
   }
 
   return result;
 }
 
 }  // namespace url