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

chrome/browser/autocomplete/history_url_provider_unittest.cc

Index: chrome/browser/autocomplete/history_url_provider_unittest.cc
diff --git a/chrome/browser/autocomplete/history_url_provider_unittest.cc b/chrome/browser/autocomplete/history_url_provider_unittest.cc
index c35b45fa90965b4354711113e6149e70f0950266..05238fa417877e9072bc2ee92a25be23e28cf4bc 100644
--- a/chrome/browser/autocomplete/history_url_provider_unittest.cc
+++ b/chrome/browser/autocomplete/history_url_provider_unittest.cc
@@ -152,12 +152,12 @@ class HistoryURLProviderTest : public testing::Test,
 
   // testing::Test
   virtual void SetUp() {
-    SetUpImpl(false);
+    ASSERT_TRUE(SetUpImpl(false));
   }
   virtual void TearDown();
 
   // Does the real setup.
-  void SetUpImpl(bool no_db);
+  bool SetUpImpl(bool no_db) WARN_UNUSED_RESULT;
 
   // Fills test data into the history system.
   void FillData();
@@ -197,7 +197,7 @@ class HistoryURLProviderTest : public testing::Test,
 class HistoryURLProviderTestNoDB : public HistoryURLProviderTest {
  protected:
   virtual void SetUp() {
-    SetUpImpl(true);
+    ASSERT_TRUE(SetUpImpl(true));
   }
 };
 
@@ -206,9 +206,10 @@ void HistoryURLProviderTest::OnProviderUpdate(bool updated_matches) {
     base::MessageLoop::current()->Quit();
 }
 
-void HistoryURLProviderTest::SetUpImpl(bool no_db) {
+bool HistoryURLProviderTest::SetUpImpl(bool no_db) {
   profile_.reset(new TestingProfile());
-  profile_->CreateHistoryService(true, no_db);
+  if (!(profile_->CreateHistoryService(true, no_db)))
+    return false;
   if (!no_db) {
     profile_->BlockUntilHistoryProcessesPendingRequests();
     profile_->BlockUntilHistoryIndexIsRefreshed();
@@ -221,6 +222,7 @@ void HistoryURLProviderTest::SetUpImpl(bool no_db) {
   TemplateURLServiceFactory::GetInstance()->SetTestingFactoryAndUse(
       profile_.get(), &HistoryURLProviderTest::CreateTemplateURLService);
   FillData();
+  return true;
 }
 
 void HistoryURLProviderTest::TearDown() {