Add missing file from revert in revision 36165

tools/testing/dart/test_runner.dart

Index: tools/testing/dart/test_runner.dart
===================================================================
--- tools/testing/dart/test_runner.dart	(revision 36164)
+++ tools/testing/dart/test_runner.dart	(working copy)
@@ -93,9 +93,6 @@
   String toString() => reproductionCommand;
 
   Future<bool> get outputIsUpToDate => new Future.value(false);
-  
-  Future<String> get cachedOutput => new Future.value(null);
-  Future writeCachedOutput(CommandOutput output) => new Future.value(null);
 }
 
 class ProcessCommand extends Command {
@@ -175,24 +172,6 @@
   bool _neverSkipCompilation;
   List<Uri> _bootstrapDependencies;
 
-  Future writeCachedOutput(CommandOutput output) {
-    var file = new io.File(TestUtils.cachedOutputFile(_outputFile));
-    return file.writeAsString(output.json)
-      .catchError((error) { 
-        DebugLogger.warning("Could not write cached output: $error");
-        return null;
-      });
-  }
-
-  Future<CommandOutput> get cachedOutput {
-    var file = new io.File(TestUtils.cachedOutputFile(_outputFile));
-    return file.exists().then((exists) {
-      if (exists) return file.readAsString().then((content) {
-        return new CompilationCommandOutputImpl.fromJson(this, content);
-      });;
-    });
-  }
-
   CompilationCommand._(String displayName,
                        this._outputFile,
                        this._neverSkipCompilation,
@@ -226,28 +205,22 @@
       });
     }
 
-    bool isUpToDate(lastModified, dependencies) {
-      if (lastModified == null) return false;
-      for (var dependency in dependencies) {
-        var dependencyLastModified =
-          TestUtils.lastModifiedCache.getLastModified(dependency);
-        if (dependencyLastModified == null ||
-            dependencyLastModified.isAfter(lastModified)) {
-          return false;
-        }
-      }
-      return true;
-    }
-
     return readDepsFile("$_outputFile.deps").then((dependencies) {
       if (dependencies != null) {
         dependencies.addAll(_bootstrapDependencies);
-        // We check if the cached output is up to date, if so we return true
-        var cachedOutputFile = TestUtils.cachedOutputFile(_outputFile);
-        var cachedOutputUri = new Uri(scheme: 'file', path: cachedOutputFile);
-        var cachedOutputLastModified = 
-            TestUtils.lastModifiedCache.getLastModified(cachedOutputUri);
-        return isUpToDate(cachedOutputLastModified, dependencies);
+        var jsOutputLastModified = TestUtils.lastModifiedCache.getLastModified(
+            new Uri(scheme: 'file', path: _outputFile));
+        if (jsOutputLastModified != null) {
+          for (var dependency in dependencies) {
+            var dependencyLastModified =
+                TestUtils.lastModifiedCache.getLastModified(dependency);
+            if (dependencyLastModified == null ||
+                dependencyLastModified.isAfter(jsOutputLastModified)) {
+              return false;
+            }
+          }
+          return true;
+        }
       }
       return false;
     });
@@ -946,8 +919,6 @@
   List<String> get diagnostics;
 
   bool get compilationSkipped;
-
-  String get json;
 }
 
 class CommandOutputImpl extends UniqueObject implements CommandOutput {
@@ -1037,9 +1008,6 @@
     }
     return Expectation.FAIL;
   }
-
-  String get json => null;
-
 }
 
 class BrowserCommandOutputImpl extends CommandOutputImpl {
@@ -1637,32 +1605,6 @@
         exitCode == 0 ? Expectation.PASS : Expectation.COMPILETIME_ERROR;
     return _negateOutcomeIfNegativeTest(outcome, testCase.isNegative);
   }
-
-  String get json {
-    var map = {
-    'stdout': stdout,
-    'stderr': stderr,
-    'exitCode': exitCode,
-    'timedOut': timedOut,
-    };
-    return JSON.encode(map);
-  }
-
-  factory CompilationCommandOutputImpl.fromJson(Command command,
-                                                String json) {
-    var obj = JSON.decode(json);
-    for (var v in ['stdout', 'stderr', 'exitCode', 'timedOut']) {
-      assert(obj.containsKey(v));
-    }
-    return new CompilationCommandOutputImpl(command,
-                                            obj['exitCode'],
-                                            obj['timedOut'],
-                                            obj['stdout'],
-                                            obj['stderr'],
-                                            const Duration(seconds: 0),
-                                            true);
-                                            
-  }
 }
 
 class JsCommandlineOutputImpl extends CommandOutputImpl
@@ -1860,12 +1802,10 @@
   }
 
   void _runCommand() {
-    command.outputIsUpToDate.then((isUpToDate) {
+    command.outputIsUpToDate.then((bool isUpToDate) {
       if (isUpToDate) {
         compilationSkipped = true;
-        command.cachedOutput.then((cached) {
-          _commandComplete(cached.exitCode, cachedOutput: cached);
-        });
+        _commandComplete(0);
       } else {
         var processEnvironment = _createProcessEnvironment();
         Future processFuture =
@@ -1958,17 +1898,12 @@
     });
   }
 
-  void _commandComplete(int exitCode, {cachedOutput: null}) {
+  void _commandComplete(int exitCode) {
     if (timeoutTimer != null) {
       timeoutTimer.cancel();
     }
-    if (cachedOutput != null) {
-      completer.complete(cachedOutput);
-    } else {
-      var commandOutput = _createCommandOutput(command, exitCode);
-      command.writeCachedOutput(commandOutput);
-      completer.complete(commandOutput);
-    }
+    var commandOutput = _createCommandOutput(command, exitCode);
+    completer.complete(commandOutput);
   }
 
   CommandOutput _createCommandOutput(ProcessCommand command, int exitCode) {