net: Append base:: in the StringPrintf calls.

net/disk_cache/sparse_control.cc

Index: net/disk_cache/sparse_control.cc
diff --git a/net/disk_cache/sparse_control.cc b/net/disk_cache/sparse_control.cc
index afd331774b84a7f7bb705c7132610450ad7dc706..2934184ef9ae8b4f46540b4024b2fb6a96e4693c 100644
--- a/net/disk_cache/sparse_control.cc
+++ b/net/disk_cache/sparse_control.cc
@@ -8,6 +8,7 @@
 #include "base/logging.h"
 #include "base/message_loop.h"
 #include "base/string_util.h"
+#include "base/stringprintf.h"
 #include "base/time.h"
 #include "net/base/io_buffer.h"
 #include "net/base/net_errors.h"
@@ -41,8 +42,8 @@ const int kBlockSize = 1024;
 // number of the particular child.
 std::string GenerateChildName(const std::string& base_name, int64 signature,
                               int64 child_id) {
-  return StringPrintf("Range_%s:%" PRIx64 ":%" PRIx64, base_name.c_str(),
-                      signature, child_id);
+  return base::StringPrintf("Range_%s:%" PRIx64 ":%" PRIx64, base_name.c_str(),
+                            signature, child_id);
 }
 
 // This class deletes the children of a sparse entry.