[Cleanup] Remove StringPrintf from global namespace

use of StringPrintf now requires prefixing with base:: or a per-scope using directive

TBR'd:
abodenha: chrome/service
brettw: content, third_party, webkit
darin: base, chrome/browser, chrome/renderer
dgarret: courgette
enne: cc
fischmann: media
gbillock: sql
joi: google_apis,components
rsleevi: net, crypto
sky: chrome/test
thestig: printing, chrome/common,
tsepez: ipc
wez: remoting
yfriedman: testing/android

NOTRY=true
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BUG=

Review URL: https://codereview.chromium.org/12767006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@188857 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/content/browser/download/download_manager_impl.cc b/content/browser/download/download_manager_impl.cc
index c9fe58c..752f16d 100644
--- a/content/browser/download/download_manager_impl.cc
+++ b/content/browser/download/download_manager_impl.cc
@@ -95,7 +95,7 @@
   if (params->offset() > 0) {
     request->SetExtraRequestHeaderByName(
         "Range",
-        StringPrintf("bytes=%" PRId64 "-", params->offset()),
+        base::StringPrintf("bytes=%" PRId64 "-", params->offset()),
         true);
 
     if (has_last_modified) {