Allow max_group = 0 to pass all groups.

chrome/browser/web_resource/promo_resource_service_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/json/json_reader.h"
 #include "base/message_loop.h"
 #include "base/string_number_conversions.h"
 #include "base/time.h"
 #include "base/utf_string_conversions.h"
 #include "base/values.h"
@@ skipping 179 matching lines @@
     for (int i = max_group_; i < num_groups_; i += incr) {
       notification_promo_.group_ = i;
       EXPECT_FALSE(notification_promo_.CanShow());
     }
 
     // Test in-range groups.
     for (int i = 0; i < max_group_; i += incr) {
       notification_promo_.group_ = i;
       EXPECT_TRUE(notification_promo_.CanShow());
     }
+
+    // When max_group_ is 0, all groups pass.
+    notification_promo_.max_group_ = 0;
+    for (int i = 0; i < num_groups_; i += incr) {
+      notification_promo_.group_ = i;
+      EXPECT_TRUE(notification_promo_.CanShow());
+    }
   }
 
   void TestViews() {
     // Test out of range views.
     for (int i = max_views_; i < max_views_ * 2; ++i) {
       notification_promo_.views_ = i;
       EXPECT_FALSE(notification_promo_.CanShow());
     }
 
     // Test in range views.
@@ skipping 198 matching lines @@
   promo_test.TestIncrement();
   promo_test.TestGplus();
 }
 
 TEST_F(PromoResourceServiceTest, PromoServerURLTest) {
   GURL promo_server_url = NotificationPromo::PromoServerURL();
   EXPECT_FALSE(promo_server_url.is_empty());
   EXPECT_TRUE(promo_server_url.SchemeIs("https"));
   // TODO(achuith): Test this better.
 }