clang/win: Let remaining chromium_code targets build with -Wextra.

remoting/host/setup/daemon_controller_delegate_win.cc

Index: remoting/host/setup/daemon_controller_delegate_win.cc
diff --git a/remoting/host/setup/daemon_controller_delegate_win.cc b/remoting/host/setup/daemon_controller_delegate_win.cc
index 70267946e134ffe0c1b612929b90055cfebcc9e0..58c6bd560ba189b78ad93b99a64cb8af162fd678 100644
--- a/remoting/host/setup/daemon_controller_delegate_win.cc
+++ b/remoting/host/setup/daemon_controller_delegate_win.cc
@@ -179,8 +179,7 @@ bool WriteConfig(const std::string& content) {
 
   // Extract the unprivileged fields from the configuration.
   base::DictionaryValue unprivileged_config_dict;
-  for (int i = 0; i < arraysize(kUnprivilegedConfigKeys); ++i) {
-    const char* key = kUnprivilegedConfigKeys[i];
+  for (const char* key : kUnprivilegedConfigKeys) {
     base::string16 value;
     if (config_dict->GetString(key, &value)) {
       unprivileged_config_dict.SetString(key, value);
@@ -382,7 +381,7 @@ void DaemonControllerDelegateWin::UpdateConfig(
     scoped_ptr<base::DictionaryValue> config,
     const DaemonController::CompletionCallback& done) {
   // Check for bad keys.
-  for (int i = 0; i < arraysize(kReadonlyKeys); ++i) {
+  for (size_t i = 0; i < arraysize(kReadonlyKeys); ++i) {
     if (config->HasKey(kReadonlyKeys[i])) {
       LOG(ERROR) << "Cannot update config: '" << kReadonlyKeys[i]
                  << "' is read only.";