Convert string16 to base::string16 in content.

content/browser/media/media_internals_handler.cc

Index: content/browser/media/media_internals_handler.cc
diff --git a/content/browser/media/media_internals_handler.cc b/content/browser/media/media_internals_handler.cc
index a45dd4f51e40f5d646116c9bf8acde3433ae7501..9a3e7be21420da31fc0115bf15f5f61ed85d9c7b 100644
--- a/content/browser/media/media_internals_handler.cc
+++ b/content/browser/media/media_internals_handler.cc
@@ -38,12 +38,12 @@ void MediaInternalsMessageHandler::OnGetEverything(
   proxy_->GetEverything();
 }
 
-void MediaInternalsMessageHandler::OnUpdate(const string16& update) {
+void MediaInternalsMessageHandler::OnUpdate(const base::string16& update) {
   // Don't try to execute JavaScript in a RenderView that no longer exists nor
   // if the chrome://media-internals page hasn't finished loading.
   RenderViewHost* host = web_ui()->GetWebContents()->GetRenderViewHost();
   if (host && page_load_complete_)
-    host->ExecuteJavascriptInWebFrame(string16(), update);
+    host->ExecuteJavascriptInWebFrame(base::string16(), update);
 }
 
 }  // namespace content