remove mega_gallery__refresh_time superseded by hot_mode_dev_cycle__benchmark (#7171)

dev/devicelab/bin/tasks/mega_gallery__refresh_time.dart

-// 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.
-
-import 'dart:async';
-
-import 'package:flutter_devicelab/tasks/refresh.dart';
-import 'package:flutter_devicelab/framework/framework.dart';
-import 'package:flutter_devicelab/framework/utils.dart';
-
-Future<Null> main() async {
-  String revision = await getCurrentFlutterRepoCommit();
-  DateTime revisionTimestamp = await getFlutterRepoCommitTimestamp(revision);
-  await task(createRefreshTest(
-    commit: revision,
-    timestamp: revisionTimestamp,
-  ));
-}

dev/devicelab/lib/tasks/refresh.dart

-// Copyright (c) 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.
-
-import 'dart:async';
-import 'dart:io';
-
-import 'package:path/path.dart' as path;
-
-import '../framework/adb.dart';
-import '../framework/benchmarks.dart';
-import '../framework/framework.dart';
-import '../framework/utils.dart';
-
-TaskFunction createRefreshTest({ String commit, DateTime timestamp }) =>
-    new EditRefreshTask(commit, timestamp);
-
-class EditRefreshTask {
-  EditRefreshTask(this.commit, this.timestamp) {
-    assert(commit != null);
-    assert(timestamp != null);
-  }
-
-  final String commit;
-  final DateTime timestamp;
-
-  Future<TaskResult> call() async {
-    Device device = await devices.workingDevice;
-    await device.unlock();
-    Benchmark benchmark = new EditRefreshBenchmark(commit, timestamp);
-    section(benchmark.name);
-    await runBenchmark(benchmark, iterations: 3, warmUpBenchmark: true);
-    return benchmark.bestResult;
-  }
-}
-
-class EditRefreshBenchmark extends Benchmark {
-  EditRefreshBenchmark(this.commit, this.timestamp) : super('edit refresh');
-
-  final String commit;
-  final DateTime timestamp;
-
-  Directory get megaDir => dir(
-      path.join(flutterDirectory.path, 'dev/benchmarks/mega_gallery'));
-  File get benchmarkFile =>
-      file(path.join(megaDir.path, 'refresh_benchmark.json'));
-
-  @override
-  TaskResult get lastResult => new TaskResult.successFromFile(benchmarkFile);
-
-  @override
-  Future<Null> init() {
-    return inDirectory(flutterDirectory, () async {
-      await dart(<String>['dev/tools/mega_gallery.dart']);
-    });
-  }
-
-  @override
-  Future<num> run() async {
-    Device device = await devices.workingDevice;
-    rm(benchmarkFile);
-    int exitCode = await inDirectory(megaDir, () async {
-      return await flutter('run',
-          options: <String>['-d', device.deviceId, '--benchmark'],
-          canFail: true);
-    });
-    if (exitCode != 0) return new Future<num>.error(exitCode);
-    return addBuildInfo(
-      benchmarkFile,
-      timestamp: timestamp,
-      expected: 200,
-      commit: commit,
-    );
-  }
-}

dev/devicelab/manifest.yaml

@@ -97,12 +97,6 @@ tasks:
     stage: devicelab
     required_agent_capabilities: ["has-android-device"]
 
-  mega_gallery__refresh_time:
-    description: >
-      Measures AOT snapshot rebuild performance on a generated large app.
-    stage: devicelab
-    required_agent_capabilities: ["has-android-device"]
-
   hot_mode_dev_cycle__benchmark:
     description: >
       Measures the performance of Dart VM hot patching feature.