Refactor cache counting into a separate helper class

chrome/browser/browsing_data/conditional_cache_deletion_helper_browsertest.cc

Index: chrome/browser/browsing_data/conditional_cache_deletion_helper_browsertest.cc
diff --git a/chrome/browser/browsing_data/conditional_cache_deletion_helper_browsertest.cc b/chrome/browser/browsing_data/conditional_cache_deletion_helper_browsertest.cc
index 5660dd277c4d0af66c80ff0207ba61ee922d1bc3..ff85583c51db5392e29164c666bb492cffad6df0 100644
--- a/chrome/browser/browsing_data/conditional_cache_deletion_helper_browsertest.cc
+++ b/chrome/browser/browsing_data/conditional_cache_deletion_helper_browsertest.cc
@@ -145,9 +145,7 @@ class ConditionalCacheDeletionHelperBrowserTest : public InProcessBrowserTest {
   void DeleteEntries(
       const base::Callback<bool(const disk_cache::Entry*)>& condition) {
     DCHECK_CURRENTLY_ON(BrowserThread::IO);
-    ConditionalCacheDeletionHelper* helper = new ConditionalCacheDeletionHelper(
-        backend_,
-        condition);
+    auto* helper = new ConditionalCacheDeletionHelper(backend_, condition);
 
     WaitForCompletion(helper->DeleteAndDestroySelfWhenFinished(done_callback_));
   }
@@ -205,12 +203,7 @@ class ConditionalCacheDeletionHelperBrowserTest : public InProcessBrowserTest {
 // that match the condition.
 IN_PROC_BROWSER_TEST_F(ConditionalCacheDeletionHelperBrowserTest, Condition) {
   // Create 5 entries.
-  std::set<std::string> keys;
-  keys.insert("123");
-  keys.insert("47");
-  keys.insert("56");
-  keys.insert("81");
-  keys.insert("42");
+  std::set<std::string> keys = {"123", "47", "56", "81", "42"};
 
   BrowserThread::PostTask(
       BrowserThread::IO, FROM_HERE,