Fix android precompilation builders after testing script refactoring

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 'test_runner.dart' show Command, CommandBuilder, CompilationCommand;
 
 import 'test_suite.dart' show TestInformation, TestUtils;
 
+import 'runtime_configuration.dart' show DartPrecompiledAdbRuntimeConfiguration;
+
 /// Grouping of a command with its expected result.
 class CommandArtifact {
   final List<Command> commands;
 
   /// Expected result of running [command].
   final String filename;
 
   /// MIME type of [filename].
   final String mimeType;
 
@@ skipping 703 matching lines @@
       List<String> originalArguments,
       CommandArtifact artifact) {
     List<String> args = [];
     if (isChecked) {
       args.add('--enable_asserts');
       args.add('--enable_type_checks');
     }
     var newOriginalArguments = new List<String>.from(originalArguments);
     for (var i = 0; i < newOriginalArguments .length; i++) {
       if (newOriginalArguments[i].endsWith(".dart")) {
-        newOriginalArguments[i] = "${artifact.filename}/out.aotsnapshot";
+        var dir = artifact.filename;
+        if (runtimeConfiguration is DartPrecompiledAdbRuntimeConfiguration) {
+          // On android the precompiled snapshot will be pushed to a different
+          // directory on the device, use that one instead.
+          dir = DartPrecompiledAdbRuntimeConfiguration.DeviceTestDir;
+        }
+        newOriginalArguments[i] = "$dir/out.aotsnapshot";
       }
     }
     return args
       ..addAll(vmOptions)
       ..addAll(sharedOptions)
       ..addAll(newOriginalArguments);
   }
 }
 
 class Dart2AppSnapshotCompilerConfiguration extends CompilerConfiguration {
@@ skipping 140 matching lines @@
       RuntimeConfiguration runtimeConfiguration,
       String buildDir,
       TestInformation info,
       List<String> vmOptions,
       List<String> sharedOptions,
       List<String> originalArguments,
       CommandArtifact artifact) {
     return <String>[];
   }
 }