[NTP Snippets] Cache images in a LevelDB

components/ntp_snippets/ntp_snippets_service_unittest.cc

 // Copyright 2015 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/ntp_snippets/ntp_snippets_service.h"
 
 #include <memory>
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/json/json_reader.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/test/histogram_tester.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/time/time.h"
+#include "components/image_fetcher/image_decoder.h"
 #include "components/image_fetcher/image_fetcher.h"
 #include "components/ntp_snippets/ntp_snippet.h"
 #include "components/ntp_snippets/ntp_snippets_database.h"
 #include "components/ntp_snippets/ntp_snippets_fetcher.h"
 #include "components/ntp_snippets/ntp_snippets_scheduler.h"
 #include "components/ntp_snippets/switches.h"
 #include "components/prefs/testing_pref_service.h"
 #include "components/signin/core/browser/account_tracker_service.h"
 #include "components/signin/core/browser/fake_profile_oauth2_token_service.h"
 #include "components/signin/core/browser/fake_signin_manager.h"
@@ skipping 285 matching lines @@
     // create the new one, otherwise opening the new database will fail.
     service_.reset();
 
     service_.reset(new NTPSnippetsService(
         enabled, pref_service_.get(), mock_sync_service_.get(), nullptr,
         std::string("fr"), &scheduler_,
         base::WrapUnique(new NTPSnippetsFetcher(
             fake_signin_manager_.get(), fake_token_service_.get(),
             std::move(request_context_getter), base::Bind(&ParseJson),
             /*is_stable_channel=*/true)),
-        /*image_fetcher=*/nullptr,
+        /*image_fetcher=*/nullptr, /*image_decoder=*/nullptr,
         base::WrapUnique(new NTPSnippetsDatabase(database_dir_.path(),
                                                  task_runner))));
     if (enabled)
       WaitForDBLoad(service_.get());
   }
 
  protected:
   const GURL& test_url() { return test_url_; }
   NTPSnippetsService* service() { return service_.get(); }
   MockScheduler& mock_scheduler() {  return scheduler_; }
@@ skipping 588 matching lines @@
   SetUpFetchResponse(GetTestJson({GetSnippet()}));
   service()->OnStateChanged();
   base::RunLoop().RunUntilIdle();
   EXPECT_EQ(NTPSnippetsService::State::READY, service()->state_);
   EXPECT_FALSE(service()->snippets().empty());
 
   service()->RemoveObserver(&mock_observer);
 }
 
 }  // namespace ntp_snippets