Update SplitString calls to new form

remoting/protocol/negotiating_host_authenticator.cc

 // Copyright 2013 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 "remoting/protocol/negotiating_host_authenticator.h"
 
 #include <algorithm>
 #include <sstream>
 
 #include "base/bind.h"
@@ skipping 81 matching lines @@
     if (supported_methods_attr.empty()) {
       // Message contains neither method nor supported-methods attributes.
       state_ = REJECTED;
       rejection_reason_ = PROTOCOL_ERROR;
       resume_callback.Run();
       return;
     }
 
     // Find the first mutually-supported method in the client's list of
     // supported-methods.
-    std::vector<std::string> supported_methods_strs;
-    base::SplitString(supported_methods_attr, kSupportedMethodsSeparator,
-                      &supported_methods_strs);
-    for (std::vector<std::string>::iterator it = supported_methods_strs.begin();
-         it != supported_methods_strs.end(); ++it) {
-      AuthenticationMethod list_value = AuthenticationMethod::FromString(*it);
+    for (const std::string& method_str :
+         base::SplitString(supported_methods_attr,
+                           std::string(1, kSupportedMethodsSeparator),
+                           base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL)) {
+      AuthenticationMethod list_value =
+          AuthenticationMethod::FromString(method_str);
       if (list_value.is_valid() &&
           std::find(methods_.begin(),
                     methods_.end(), list_value) != methods_.end()) {
         // Found common method.
         method = list_value;
         break;
       }
     }
 
     if (!method.is_valid()) {
@@ skipping 63 matching lines @@
            current_method_.type() == AuthenticationMethod::SPAKE2_PAIR);
     current_authenticator_ = V2Authenticator::CreateForHost(
         local_cert_, local_key_pair_, shared_secret_hash_,
         preferred_initial_state);
   }
   resume_callback.Run();
 }
 
 }  // namespace protocol
 }  // namespace remoting