[Cleanup] Remove StringPrintf from global namespace

chrome/renderer/searchbox/searchbox_extension.cc

Index: chrome/renderer/searchbox/searchbox_extension.cc
diff --git a/chrome/renderer/searchbox/searchbox_extension.cc b/chrome/renderer/searchbox/searchbox_extension.cc
index 9f5126d8b9b0baddc1b330e670e7d1ec85403995..a31b7deb5d7d93f963e09ac74d45a5acd22eabef 100644
--- a/chrome/renderer/searchbox/searchbox_extension.cc
+++ b/chrome/renderer/searchbox/searchbox_extension.cc
@@ -66,14 +66,14 @@ void Dispatch(WebKit::WebFrame* frame, const WebKit::WebString& script) {
 
 v8::Handle<v8::String> GenerateThumbnailURL(uint64 most_visited_item_id) {
   return UTF8ToV8String(
-      StringPrintf("chrome-search://thumb/%s",
-                   base::Uint64ToString(most_visited_item_id).c_str()));
+      base::StringPrintf("chrome-search://thumb/%s",
+                         base::Uint64ToString(most_visited_item_id).c_str()));
 }
 
 v8::Handle<v8::String> GenerateFaviconURL(uint64 most_visited_item_id) {
   return UTF8ToV8String(
-      StringPrintf("chrome-search://favicon/%s",
-                   base::Uint64ToString(most_visited_item_id).c_str()));
+      base::StringPrintf("chrome-search://favicon/%s",
+                         base::Uint64ToString(most_visited_item_id).c_str()));
 }
 
 const GURL MostVisitedItemIDToURL(