base/win: Add documentation to RegKey::Read/Write functions.

remoting/host/plugin/policy_hack/nat_policy_win.cc

Index: remoting/host/plugin/policy_hack/nat_policy_win.cc
diff --git a/remoting/host/plugin/policy_hack/nat_policy_win.cc b/remoting/host/plugin/policy_hack/nat_policy_win.cc
index bd0e0bccd5d7e503995ab46274caac1aa7fa5ad6..379afb4c7e19684266548792746e37296b04b061 100644
--- a/remoting/host/plugin/policy_hack/nat_policy_win.cc
+++ b/remoting/host/plugin/policy_hack/nat_policy_win.cc
@@ -115,14 +115,14 @@ class NatPolicyWin :
                                 uint32* result) const {
     DWORD value = 0;
     RegKey policy_key(HKEY_LOCAL_MACHINE, kRegistrySubKey, KEY_READ);
-    if (policy_key.ReadValueDW(value_name.c_str(), &value) == ERROR_SUCCESS) {
+    if (policy_key.ReadValue(value_name.c_str(), &value) == ERROR_SUCCESS) {
       *result = value;
       return true;
     }
 
     if (policy_key.Open(HKEY_CURRENT_USER, kRegistrySubKey, KEY_READ) ==
         ERROR_SUCCESS) {
-      if (policy_key.ReadValueDW(value_name.c_str(), &value) == ERROR_SUCCESS) {
+      if (policy_key.ReadValue(value_name.c_str(), &value) == ERROR_SUCCESS) {
         *result = value;
         return true;
       }