base: Fix the TODO in string_util.h

skia/ext/vector_canvas_unittest.cc

Index: skia/ext/vector_canvas_unittest.cc
diff --git a/skia/ext/vector_canvas_unittest.cc b/skia/ext/vector_canvas_unittest.cc
index 87fac81403a2cecaaeec30c63c782f8b7fe69ce4..e4c748694f9f07d85a7e22e4216ca9462d4d2e74 100644
--- a/skia/ext/vector_canvas_unittest.cc
+++ b/skia/ext/vector_canvas_unittest.cc
@@ -12,6 +12,7 @@
 #include "base/file_util.h"
 #include "base/path_service.h"
 #include "base/string_util.h"
+#include "base/stringprintf.h"
 #include "base/utf_string_conversions.h"
 #include "skia/ext/vector_canvas.h"
 #include "skia/ext/vector_platform_device_emf_win.h"
@@ -401,7 +402,7 @@ class VectorCanvasTest : public ImageTest {
   // Compares both canvas and returns the pixel difference in percentage between
   // both images. 0 on success and ]0, 100] on failure.
   double ProcessImage(const FilePath::StringType& filename) {
-    std::wstring number(StringPrintf(L"%02d_", number_++));
+    std::wstring number(base::StringPrintf(L"%02d_", number_++));
     double diff1 = parent::ProcessCanvas(*vcanvas_, number + L"vc_" + filename);
     double diff2 = parent::ProcessCanvas(*pcanvas_, number + L"pc_" + filename);
     if (!compare_canvas_)