Move ReplaceStringPlaceholders to base namespace.

remoting/host/disconnect_window_win.cc

Index: remoting/host/disconnect_window_win.cc
diff --git a/remoting/host/disconnect_window_win.cc b/remoting/host/disconnect_window_win.cc
index 7617b091ad0413e7f2d142da04b4f8150e29cec5..c0a7ecc1857e15f264c9227252232520db916867 100644
--- a/remoting/host/disconnect_window_win.cc
+++ b/remoting/host/disconnect_window_win.cc
@@ -316,9 +316,9 @@ bool DisconnectWindowWin::SetStrings() {
   }
 
   // Format and truncate "Your desktop is shared with ..." message.
-  message_text = ReplaceStringPlaceholders(message_text,
-                                           base::UTF8ToUTF16(username_),
-                                           nullptr);
+  message_text = base::ReplaceStringPlaceholders(message_text,
+                                                 base::UTF8ToUTF16(username_),
+                                                 nullptr);
   if (message_text.length() > kMaxSharingWithTextLength)
     message_text.erase(kMaxSharingWithTextLength);