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

url/scheme_host_port.cc

Index: url/scheme_host_port.cc
diff --git a/url/scheme_host_port.cc b/url/scheme_host_port.cc
index 0fe87c50f9862c86f7d1af4bd9bec53ddb65ef8d..6c03101e25fabb8e8ef27e5bc9a16d50d6d0c908 100644
--- a/url/scheme_host_port.cc
+++ b/url/scheme_host_port.cc
@@ -116,24 +116,24 @@ bool IsValidInput(const base::StringPiece& scheme,
 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) {}