[Cleanup] Remove StringPrintf from global namespace

net/disk_cache/backend_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/basictypes.h"
 #include "base/file_util.h"
 #include "base/string_util.h"
 #include "base/stringprintf.h"
 #include "base/third_party/dynamic_annotations/dynamic_annotations.h"
 #include "base/threading/platform_thread.h"
@@ skipping 631 matching lines @@
   BackendChain();
 }
 
 TEST_F(DiskCacheBackendTest, NewEvictionTrim) {
   SetNewEviction();
   SetDirectMode();
   InitCache();
 
   disk_cache::Entry* entry;
   for (int i = 0; i < 100; i++) {
-    std::string name(StringPrintf("Key %d", i));
+    std::string name(base::StringPrintf("Key %d", i));
     ASSERT_EQ(net::OK, CreateEntry(name, &entry));
     entry->Close();
     if (i < 90) {
       // Entries 0 to 89 are in list 1; 90 to 99 are in list 0.
       ASSERT_EQ(net::OK, OpenEntry(name, &entry));
       entry->Close();
     }
   }
 
   // The first eviction must come from list 1 (10% limit), the second must come
@@ skipping 1982 matching lines @@
   EXPECT_TRUE(disk_cache::DeleteCacheFile(name));
 }
 
 TEST_F(DiskCacheBackendTest, UpdateRankForExternalCacheHit) {
   SetDirectMode();
   InitCache();
 
   disk_cache::Entry* entry;
 
   for (int i = 0; i < 2; ++i) {
-    std::string key = StringPrintf("key%d", i);
+    std::string key = base::StringPrintf("key%d", i);
     ASSERT_EQ(net::OK, CreateEntry(key, &entry));
     entry->Close();
   }
 
   // Ping the oldest entry.
   cache_->OnExternalCacheHit("key0");
 
   TrimForTest(false);
 
   // Make sure the older key remains.
   EXPECT_EQ(1, cache_->GetEntryCount());
   ASSERT_EQ(net::OK, OpenEntry("key0", &entry));
   entry->Close();
 }
 
 TEST_F(DiskCacheBackendTest, ShaderCacheUpdateRankForExternalCacheHit) {
   SetCacheType(net::SHADER_CACHE);
   SetDirectMode();
   InitCache();
 
   disk_cache::Entry* entry;
 
   for (int i = 0; i < 2; ++i) {
-    std::string key = StringPrintf("key%d", i);
+    std::string key = base::StringPrintf("key%d", i);
     ASSERT_EQ(net::OK, CreateEntry(key, &entry));
     entry->Close();
   }
 
   // Ping the oldest entry.
   cache_->OnExternalCacheHit("key0");
 
   TrimForTest(false);
 
   // Make sure the older key remains.
   EXPECT_EQ(1, cache_->GetEntryCount());
   ASSERT_EQ(net::OK, OpenEntry("key0", &entry));
   entry->Close();
 }