Add field to monitor last visited time for each search engine

components/search_engines/default_search_manager_unittest.cc

 // Copyright 2014 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 "components/search_engines/default_search_manager.h"
 
 #include <stddef.h>
 
 #include <memory>
 
@@ skipping 11 matching lines @@
 #include "components/search_engines/template_url_prepopulate_data.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace {
 // A dictionary to hold all data related to the Default Search Engine.
 // Eventually, this should replace all the data stored in the
 // default_search_provider.* prefs.
 const char kDefaultSearchProviderData[] =
     "default_search_provider_data.template_url_data";
 
-// Checks that the two TemplateURLs are similar. Does not check the id, the
-// date_created or the last_modified time.  Neither pointer should be NULL.
+// Checks that the two TemplateURLs are similar. Does not check the id or
+// any time-related fields.  Neither pointer should be null.
 void ExpectSimilar(const TemplateURLData* expected,
                    const TemplateURLData* actual) {
   ASSERT_TRUE(expected != NULL);
   ASSERT_TRUE(actual != NULL);
 
   EXPECT_EQ(expected->short_name(), actual->short_name());
   EXPECT_EQ(expected->keyword(), actual->keyword());
   EXPECT_EQ(expected->url(), actual->url());
   EXPECT_EQ(expected->suggestions_url, actual->suggestions_url);
   EXPECT_EQ(expected->favicon_url, actual->favicon_url);
@@ skipping 60 matching lines @@
   data->SetURL(std::string("http://").append(type).append("foo/{searchTerms}"));
   data->suggestions_url = std::string("http://").append(type).append("sugg");
   data->alternate_urls.push_back(
       std::string("http://").append(type).append("foo/alt"));
   data->favicon_url = GURL("http://icon1");
   data->safe_for_autoreplace = true;
   data->input_encodings = base::SplitString(
       "UTF-8;UTF-16", ";", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
   data->date_created = base::Time();
   data->last_modified = base::Time();
+  data->last_visited = base::Time();
   return data;
 }
 
 }  // namespace
 
 class DefaultSearchManagerTest : public testing::Test {
  public:
   DefaultSearchManagerTest() {};
 
   void SetUp() override {
@@ skipping 21 matching lines @@
   data.SetKeyword(base::UTF8ToUTF16("key1"));
   data.SetURL("http://foo1/{searchTerms}");
   data.suggestions_url = "http://sugg1";
   data.alternate_urls.push_back("http://foo1/alt");
   data.favicon_url = GURL("http://icon1");
   data.safe_for_autoreplace = true;
   data.input_encodings = base::SplitString(
       "UTF-8;UTF-16", ";", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
   data.date_created = base::Time();
   data.last_modified = base::Time();
+  data.last_modified = base::Time();
 
   manager.SetUserSelectedDefaultSearchEngine(data);
   TemplateURLData* read_data = manager.GetDefaultSearchEngine(NULL);
   ExpectSimilar(&data, read_data);
 }
 
 // Test DefaultSearchmanager handles user-selected DSEs correctly.
 TEST_F(DefaultSearchManagerTest, DefaultSearchSetByUserPref) {
   size_t default_search_index = 0;
   DefaultSearchManager manager(pref_service(),
@@ skipping 130 matching lines @@
 
   ExpectSimilar(extension_data_3.get(),
                 manager.GetDefaultSearchEngine(&source));
   EXPECT_EQ(DefaultSearchManager::FROM_EXTENSION, source);
 
   manager.ClearExtensionControlledDefaultSearchEngine();
 
   ExpectSimilar(data.get(), manager.GetDefaultSearchEngine(&source));
   EXPECT_EQ(DefaultSearchManager::FROM_USER, source);
 }