Significantly reduce the timeout app_jit is given on the buildbot

tools/testing/dart/compiler_configuration.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library compiler_configuration;
 
 import 'dart:io' show Platform;
 
 import 'runtime_configuration.dart' show RuntimeConfiguration;
 import 'runtime_configuration.dart' show DartPrecompiledAdbRuntimeConfiguration;
@@ skipping 771 matching lines @@
       ..addAll(sharedOptions)
       ..addAll(originalArguments);
   }
 }
 
 class Dart2AppSnapshotCompilerConfiguration extends CompilerConfiguration {
   Dart2AppSnapshotCompilerConfiguration({bool isDebug, bool isChecked})
       : super._subclass(isDebug: isDebug, isChecked: isChecked);
 
   int computeTimeoutMultiplier() {
-    int multiplier = 2;
-    if (isDebug) multiplier *= 4;
+    int multiplier = 1;
+    if (isDebug) multiplier *= 2;
     if (isChecked) multiplier *= 2;
     return multiplier;

[kustermann, 2017/02/10 11:43:45]

The returned value is applied again with 2 due to:

configuration['timeout'] = 60 * compilerMulitiplier * runtimeMultiplier;

This is just changing the first "compilerMultiplier".

   }
 
   CommandArtifact computeCompilationArtifact(
       String buildDir,
       String tempDir,
       CommandBuilder commandBuilder,
       List arguments,
       Map<String, String> environmentOverrides) {
     var snapshot = "$tempDir/out.jitsnapshot";
     return new CommandArtifact(<Command>[
@@ skipping 122 matching lines @@
       RuntimeConfiguration runtimeConfiguration,
       String buildDir,
       TestInformation info,
       List<String> vmOptions,
       List<String> sharedOptions,
       List<String> originalArguments,
       CommandArtifact artifact) {
     return <String>[];
   }
 }