Change output of test.dart --list option, so it can be parsed automatically.

compiler/javatests/com/google/dart/corelib/SharedTests.java

Index: compiler/javatests/com/google/dart/corelib/SharedTests.java
diff --git a/compiler/javatests/com/google/dart/corelib/SharedTests.java b/compiler/javatests/com/google/dart/corelib/SharedTests.java
index 6be78b7ed480e36f00d74888d0e685d027a953aa..498c4b76069d7664911f40c7e7187fa05106ce57 100644
--- a/compiler/javatests/com/google/dart/corelib/SharedTests.java
+++ b/compiler/javatests/com/google/dart/corelib/SharedTests.java
@@ -70,7 +70,10 @@ public class SharedTests extends TestSetup {
           String line;
           while ((line = lineReader.readLine()) != null) {
             if (!line.startsWith("dartc/")) {
-              suite.addTest(SharedTestCase.getInstance(line, false));
+              Test result = SharedTestCase.getInstance(line, false);
+              if (result != null) {
+                suite.addTest(result);
+              }
             } else if (line.startsWith("dartc/client/")) {
               suite.addTest(SharedTestCase.getInstance(line, true));
             }