Revert "Added support for skipping redundant dart2js compilations."

tools/testing/dart/test_progress.dart

Index: tools/testing/dart/test_progress.dart
diff --git a/tools/testing/dart/test_progress.dart b/tools/testing/dart/test_progress.dart
index 421ea149a482db025bf6ccab4d1ff5c06cb9ef2b..68ee94572660968087aacf2ac5d6ba266899eba1 100644
--- a/tools/testing/dart/test_progress.dart
+++ b/tools/testing/dart/test_progress.dart
@@ -53,10 +53,6 @@ class ProgressIndicator {
       }
       _appendToFlakyFile(buf.toString());
     }
-    for (var commandOutput in test.commandOutputs.values) {
-      if (commandOutput.compilationSkipped)
-        _skippedCompilations++;
-    }
 
     if (test.lastCommandOutput.unexpectedOutput) {
       _failedTests++;
@@ -75,13 +71,6 @@ class ProgressIndicator {
     _allTestsKnown = true;
   }
 
-  void _printSkippedCompilationInfo() {
-    if (_skippedCompilations > 0) {
-      print('\n$_skippedCompilations compilations were skipped because '
-            'the previous output was already up to date\n');
-    }
-  }
-
   void _printTimingInformation() {
     if (_printTiming) {
       // TODO: We should take all the commands into account
@@ -104,7 +93,6 @@ class ProgressIndicator {
   void allDone() {
     _printFailureSummary();
     _printStatus();
-    _printSkippedCompilationInfo();
     _printTimingInformation();
     stdout.close();
     stderr.close();
@@ -237,7 +225,6 @@ class ProgressIndicator {
   int _foundTests = 0;
   int _passedTests = 0;
   int _failedTests = 0;
-  int _skippedCompilations = 0;
   bool _allTestsKnown = false;
   Date _startTime;
   bool _printTiming;
@@ -265,7 +252,6 @@ abstract class CompactIndicator extends ProgressIndicator {
   void allDone() {
     stdout.write('\n'.charCodes);
     _printFailureSummary();
-    _printSkippedCompilationInfo();
     _printTimingInformation();
     if (_failedTests > 0) {
       // We may have printed many failure logs, so reprint the summary data.