Update uses of UTF conversions in content/ to use the base:: namespace.

content/renderer/npapi/webplugin_delegate_proxy.cc

Index: content/renderer/npapi/webplugin_delegate_proxy.cc
diff --git a/content/renderer/npapi/webplugin_delegate_proxy.cc b/content/renderer/npapi/webplugin_delegate_proxy.cc
index 3a719763cc43ae10ec249250b11b93c6e4df092f..90e7c1d779b37b0d386b7d70bd3e2f62a8a62e7f 100644
--- a/content/renderer/npapi/webplugin_delegate_proxy.cc
+++ b/content/renderer/npapi/webplugin_delegate_proxy.cc
@@ -1211,7 +1211,7 @@ bool WebPluginDelegateProxy::UseSynchronousGeometryUpdates() {
   // Need to update geometry synchronously with WMP, otherwise if a site
   // scripts the plugin to start playing while it's in the middle of handling
   // an update geometry message, videos don't play.  See urls in bug 20260.
-  if (info_.name.find(ASCIIToUTF16("Windows Media Player")) !=
+  if (info_.name.find(base::ASCIIToUTF16("Windows Media Player")) !=
       base::string16::npos)
     return true;