Add asserts to TestingProfile::CreateHistoryService to ensure files are deleted

chrome/test/perf/generate_profile.cc

Index: chrome/test/perf/generate_profile.cc
diff --git a/chrome/test/perf/generate_profile.cc b/chrome/test/perf/generate_profile.cc
index d37060aabe20e8173586c902f6dda7a49ebb1f77..fe46c3d0765ed4aa3f8c1c967c04f10089e0be61 100644
--- a/chrome/test/perf/generate_profile.cc
+++ b/chrome/test/perf/generate_profile.cc
@@ -229,7 +229,10 @@ bool GenerateProfile(GenerateProfileTypes types,
   content::TestBrowserThread ui_thread(BrowserThread::UI, &message_loop);
   content::TestBrowserThread db_thread(BrowserThread::DB, &message_loop);
   TestingProfile profile;
-  profile.CreateHistoryService(false, false);
+  if (!profile.CreateHistoryService(false, false)) {
+      PLOG(ERROR) << "Creating history service failed";
+      return false;
+  }
   if (types & TOP_SITES) {
     profile.CreateTopSites();
     profile.BlockUntilTopSitesLoaded();