Revert run large html tests individually.

tools/testing/dart/test_runner.dart

Index: tools/testing/dart/test_runner.dart
===================================================================
--- tools/testing/dart/test_runner.dart	(revision 14666)
+++ tools/testing/dart/test_runner.dart	(working copy)
@@ -182,25 +182,11 @@
    */
   int numRetries;
 
-  /**
-   * True if this test is dependent on another test completing before it can
-   * star (for example, we might need to depend on some other test completing
-   * first).
-   */
-  bool waitingForOtherTest;
-  
-  /**
-   * The set of test cases that wish to be notified when this test has
-   * completed.
-   */
-  List<BrowserTestCase> observers;
-
   BrowserTestCase(displayName, commands, configuration, completedHandler,
-      expectedOutcomes, info, isNegative, [this.waitingForOtherTest = false])
+      expectedOutcomes, info, isNegative)
     : super(displayName, commands, configuration, completedHandler,
         expectedOutcomes, isNegative: isNegative, info: info) {
     numRetries = 2; // Allow two retries to compensate for flaky browser tests.
-    observers = [];
   }
 
   List<String> get _lastArguments => commands.last.arguments;
@@ -209,21 +195,6 @@
 
   List<String> get batchTestArguments =>
       _lastArguments.getRange(1, _lastArguments.length - 1);
-
-  /** Add a test case to listen for when this current test has completed. */
-  void addObserver(BrowserTestCase testCase) {
-    observers.add(testCase);
-  }
-
-  /**
-   * Notify all of the test cases that are dependent on this one that they can
-   * proceed.
-   */
-  void notifyObservers() {
-    for (BrowserTestCase testCase in observers) {
-      testCase.waitingForOtherTest = false;
-    }
-  }
 }
 
 
@@ -1105,8 +1076,8 @@
    * True if we are using a browser + platform combination that needs the
    * Selenium server jar.
    */
-  bool get _needsSelenium => (Platform.operatingSystem == 'macos' &&
-      browserUsed == 'safari') || browserUsed == 'opera';
+  bool get _needsSelenium => Platform.operatingSystem == 'macos' &&
+      browserUsed == 'safari';
 
   /** True if the Selenium Server is ready to be used. */
   bool get _isSeleniumAvailable => _seleniumServer != null ||
@@ -1278,12 +1249,11 @@
         print(Strings.join(fields, '\t'));
         return;
       }
-      if (test.usesWebDriver && _needsSelenium && !_isSeleniumAvailable || (test
-          is BrowserTestCase && test.waitingForOtherTest)) {
-        // The test is not yet ready to run. Put the test back in
+      if (test.usesWebDriver && _needsSelenium && !_isSeleniumAvailable) {
+        // The server is not ready to run Selenium tests. Put the test back in
         // the queue.  Avoid spin-polling by using a timeout.
         _tests.add(test);
-        new Timer(100, (timer) {_tryRunTest();});  // Don't lose a process.
+        new Timer(1000, (timer) {_tryRunTest();});  // Don't lose a process.
         return;
       }
       if (_verbose) {
@@ -1298,18 +1268,12 @@
       void wrapper(TestCase test_arg) {
         _numProcesses--;
         _progress.done(test_arg);
-        if (test_arg is BrowserTestCase) test_arg.notifyObservers();
         _tryRunTest();
         oldCallback(test_arg);
       };
       test.completedHandler = wrapper;
-
-      if ((test.configuration['compiler'] == 'dartc' &&
-           test.displayName != 'dartc/junit_tests') ||
-          (test.commands.length == 1 && test.usesWebDriver &&
-           !test.configuration['noBatch'])) {
-        // Dartc and browser test cases that do not require a precompilation
-        // step, start with the batch runner right away.
+      if (test.configuration['compiler'] == 'dartc' &&
+          test.displayName != 'dartc/junit_tests') {
         _getBatchRunner(test).startTest(test);
       } else {
         // Once we've actually failed a test, technically, we wouldn't need to