remove node.js dependency by running the frog compiler in

tools/testing/dart/test_runner.dart

Index: tools/testing/dart/test_runner.dart
diff --git a/tools/testing/dart/test_runner.dart b/tools/testing/dart/test_runner.dart
index d3c97e120ff8a83775c6a784639b05e0695b601d..a3232e357f2853332bd9beac844f793548290205 100644
--- a/tools/testing/dart/test_runner.dart
+++ b/tools/testing/dart/test_runner.dart
@@ -511,7 +511,6 @@ class RunningProcess {
     if (currentStep == totalSteps) { // done with test command
       testComplete(exitCode);
     } else if (exitCode != 0) {
-      stderr.add('test.dart: Compilation failed$suffix, exit code $exitCode\n');

[Bill Hesse, 2012/03/08 10:34:27]

This is deleted because the absence of the "Compilation finished (step n of
total)" is enough to say where the error is?

[mattsh, 2012/03/08 16:43:28]

Good catch.  I didn't intend to delete this, put back now.

       testComplete(exitCode);
     } else {
       stderr.add('test.dart: Compilion finished $suffix\n');

[Bill Hesse, 2012/03/08 10:34:27]

Compilation, not Compilion.

[mattsh, 2012/03/08 16:43:28]

This spelling typo is unrelated to this CL, I'd prefer to fix in a separate CL
if that's OK.