Cleaned up usage of std::wstring in src/remoting. Added presubmit warning supressions for the reman…

remoting/host/policy_hack/policy_watcher_win.cc

Index: remoting/host/policy_hack/policy_watcher_win.cc
diff --git a/remoting/host/policy_hack/policy_watcher_win.cc b/remoting/host/policy_hack/policy_watcher_win.cc
index fba75f0b74ee6e6a6495785eaae4882cbb1bdbce..a333911f9ad84b658a2cf167da2812887805c062 100644
--- a/remoting/host/policy_hack/policy_watcher_win.cc
+++ b/remoting/host/policy_hack/policy_watcher_win.cc
@@ -114,7 +114,9 @@ class PolicyWatcherWin :
 
   bool GetRegistryPolicyString(const std::string& value_name,
                                std::string* result) const {
+    // presubmit: allow wstring
     std::wstring value_name_wide = UTF8ToWide(value_name);
+    // presubmit: allow wstring
     std::wstring value;
     RegKey policy_key(HKEY_LOCAL_MACHINE, kRegistrySubKey, KEY_READ);
     if (policy_key.ReadValue(value_name_wide.c_str(), &value) ==
@@ -136,6 +138,7 @@ class PolicyWatcherWin :
 
   bool GetRegistryPolicyInteger(const std::string& value_name,
                                 uint32* result) const {
+    // presubmit: allow wstring
     std::wstring value_name_wide = UTF8ToWide(value_name);
     DWORD value = 0;
     RegKey policy_key(HKEY_LOCAL_MACHINE, kRegistrySubKey, KEY_READ);