[Cleanup] Remove StringPrintf from global namespace

chrome/browser/extensions/webstore_startup_installer_browsertest.cc

Index: chrome/browser/extensions/webstore_startup_installer_browsertest.cc
diff --git a/chrome/browser/extensions/webstore_startup_installer_browsertest.cc b/chrome/browser/extensions/webstore_startup_installer_browsertest.cc
index 0afb3ca8a25fba24088645025aaca981dea34d58..62ac4f9cdfe8a6412f0fa985a6061f188209a518 100644
--- a/chrome/browser/extensions/webstore_startup_installer_browsertest.cc
+++ b/chrome/browser/extensions/webstore_startup_installer_browsertest.cc
@@ -82,7 +82,8 @@ class WebstoreStartupInstallerTest : public InProcessBrowserTest {
 
   void RunTest(const std::string& test_function_name) {
     bool result = false;
-    std::string script = StringPrintf("%s('%s')", test_function_name.c_str(),
+    std::string script = base::StringPrintf(
+        "%s('%s')", test_function_name.c_str(),
         test_gallery_url_.c_str());
     ASSERT_TRUE(content::ExecuteScriptAndExtractBool(
         browser()->tab_strip_model()->GetActiveWebContents(),
@@ -100,7 +101,7 @@ class WebstoreStartupInstallerTest : public InProcessBrowserTest {
   bool RunIndexedTest(const std::string& test_function_name,
                       int i) {
     std::string result = "FAILED";
-    std::string script = StringPrintf("%s('%s', %d)",
+    std::string script = base::StringPrintf("%s('%s', %d)",
         test_function_name.c_str(), test_gallery_url_.c_str(), i);
     EXPECT_TRUE(content::ExecuteScriptAndExtractString(
         browser()->tab_strip_model()->GetActiveWebContents(),