webkit: Append base:: in the StringPrintf calls.

webkit/support/webkit_support.cc

Index: webkit/support/webkit_support.cc
diff --git a/webkit/support/webkit_support.cc b/webkit/support/webkit_support.cc
index 744205a0ee662c7bf3597853c95c7c186357f0a7..f955d78c85fe51796d92ee2613e245e9e817cbf1 100644
--- a/webkit/support/webkit_support.cc
+++ b/webkit/support/webkit_support.cc
@@ -18,6 +18,7 @@
 #include "base/process_util.h"
 #include "base/string_piece.h"
 #include "base/string_util.h"
+#include "base/stringprintf.h"
 #include "base/sys_string_conversions.h"
 #include "base/time.h"
 #include "base/utf_string_conversions.h"
@@ -468,7 +469,7 @@ std::string MakeURLErrorDescription(const WebKit::WebURLError& error) {
   } else
     DLOG(WARNING) << "Unknown error domain";
 
-  return StringPrintf("<NSError domain %s, code %d, failing URL \"%s\">",
+  return base::StringPrintf("<NSError domain %s, code %d, failing URL \"%s\">",
       domain.c_str(), code, error.unreachableURL.spec().data());
 }