Add base:: to string16 in content/.

content/browser/media/webrtc_internals_message_handler.cc

Index: content/browser/media/webrtc_internals_message_handler.cc
diff --git a/content/browser/media/webrtc_internals_message_handler.cc b/content/browser/media/webrtc_internals_message_handler.cc
index 04cb8a9bb89353c3f29f31d2475a824c88d40f0a..3c87c7578e22fe45d3c036327b40c22095c8363a 100644
--- a/content/browser/media/webrtc_internals_message_handler.cc
+++ b/content/browser/media/webrtc_internals_message_handler.cc
@@ -81,11 +81,11 @@ void WebRTCInternalsMessageHandler::OnDOMLoadDone(
 
   if (WebRTCInternals::GetInstance()->aec_dump_enabled()) {
     std::vector<const base::Value*> args_vector;
-    string16 script = WebUI::GetJavascriptCall("setAecRecordingEnabled",
-                                               args_vector);
+    base::string16 script = WebUI::GetJavascriptCall("setAecRecordingEnabled",
+                                                     args_vector);
     RenderViewHost* host = web_ui()->GetWebContents()->GetRenderViewHost();
     if (host)
-      host->ExecuteJavascriptInWebFrame(string16(), script);
+      host->ExecuteJavascriptInWebFrame(base::string16(), script);
   }
 }