net: Append base:: in the StringPrintf calls.

net/http/mock_gssapi_library_posix.cc

Index: net/http/mock_gssapi_library_posix.cc
diff --git a/net/http/mock_gssapi_library_posix.cc b/net/http/mock_gssapi_library_posix.cc
index fed2ccdb557413ecd6dd156254e8d4bfbb195ab6..d0a46b1dd174c7f2b4e6962b2230b34cb1480398 100644
--- a/net/http/mock_gssapi_library_posix.cc
+++ b/net/http/mock_gssapi_library_posix.cc
@@ -6,6 +6,7 @@
 
 #include "base/logging.h"
 #include "base/string_util.h"
+#include "base/stringprintf.h"
 #include "net/third_party/gssapi/gssapi.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ -312,9 +313,9 @@ OM_uint32 MockGSSAPILibrary::display_status(
       gss_buffer_t status_string) {
   if (minor_status)
     *minor_status = 0;
-  std::string msg = StringPrintf("Value: %u, Type %u",
-                                 status_value,
-                                 status_type);
+  std::string msg = base::StringPrintf("Value: %u, Type %u",
+                                       status_value,
+                                       status_type);
   if (message_context)
     *message_context = 0;
   BufferFromString(msg, status_string);