Add PageLoad.* metrics for Offline Previews

chrome/browser/android/offline_pages/offline_page_tab_helper_unittest.cc

 // Copyright 2016 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 "chrome/browser/android/offline_pages/offline_page_tab_helper.h"
 
 #include <memory>
 
 #include "base/bind.h"
 #include "base/feature_list.h"
@@ skipping 350 matching lines @@
   StartLoad(kTestPageUrl);
   // Gives a chance to run delayed task to do redirection.
   RunUntilIdle();
 
   const OfflinePageItem* item =
       OfflinePageUtils::GetOfflinePageFromWebContents(web_contents());
   EXPECT_EQ(expected_offline_id, item->offline_id);
   EXPECT_EQ(expected_offline_url, item->GetOfflineURL());
   EXPECT_EQ(kLastNNamespace, item->client_id.name_space);
   EXPECT_EQ(base::IntToString(kTabId), item->client_id.id);
+  EXPECT_FALSE(offline_page_tab_helper()->is_preview());
 }
 
 TEST_F(OfflinePageTabHelperTest, PageFor2GSlow) {
   SimulateHasNetworkConnectivity(true);
   TestingProfile* test_profile = profile();
   UINetworkQualityEstimatorService* nqe_service =
       UINetworkQualityEstimatorServiceFactory::GetForProfile(test_profile);
   nqe_service->SetEffectiveConnectionTypeForTesting(
       net::EFFECTIVE_CONNECTION_TYPE_SLOW_2G);
 
@@ skipping 13 matching lines @@
 
   StartLoad(kTestPageUrl);
   // Gives a chance to run delayed task to do redirection.
   RunUntilIdle();
 
   // This page should be fresh enough to cause a redirect.
   item = OfflinePageUtils::GetOfflinePageFromWebContents(web_contents());
   EXPECT_EQ(offline_url(), item->GetOfflineURL());
   EXPECT_EQ(online_url(), item->url);
 
+  EXPECT_TRUE(offline_page_tab_helper()->is_preview());
+
   clock()->Advance(base::TimeDelta::FromDays(8));
   StartLoad(kTestPageUrl);
   // Gives a chance to run delayed task to do redirection.
   RunUntilIdle();
 
   // This page should not be fresh enough to cause a redirect.
   item = OfflinePageUtils::GetOfflinePageFromWebContents(web_contents());
   EXPECT_EQ(nullptr, item);
+  EXPECT_FALSE(offline_page_tab_helper()->is_preview());
 }
 
 // This test saves another copy of page from Async Loading namespace
 // and verifies it is redirected to it (as it is more recent).
 TEST_F(OfflinePageTabHelperTest, SwitchToOfflineAsyncLoadedPageOnNoNetwork) {
   // Saves an offline page.
   OfflinePageModel* model =
       OfflinePageModelFactory::GetForBrowserContext(browser_context());
   std::unique_ptr<OfflinePageTestArchiver> archiver(BuildArchiver(
       kTestPageUrl,
@@ skipping 11 matching lines @@
   SimulateHasNetworkConnectivity(false);
   StartLoad(kTestPageUrl);
   // Gives a chance to run delayed task to do redirection.
   RunUntilIdle();
 
   const OfflinePageItem* item =
       OfflinePageUtils::GetOfflinePageFromWebContents(web_contents());
   EXPECT_EQ(expected_offline_id, item->offline_id);
   EXPECT_EQ(expected_offline_url, item->GetOfflineURL());
   EXPECT_EQ(kAsyncNamespace, item->client_id.name_space);
+  EXPECT_FALSE(offline_page_tab_helper()->is_preview());
 }
 
 }  // namespace offline_pages