Fixed bug in r16247: variable naming issues

tools/testing/dart/test_suite.dart

Index: tools/testing/dart/test_suite.dart
diff --git a/tools/testing/dart/test_suite.dart b/tools/testing/dart/test_suite.dart
index 523778bb54d20d43be585ecbb748b22f88855303..4d0447275815800715b575d2e178214739be9c54 100644
--- a/tools/testing/dart/test_suite.dart
+++ b/tools/testing/dart/test_suite.dart
@@ -969,9 +969,10 @@ class StandardTestSuite extends TestSuite {
             dartFlags.addAll(vmOptions);
           }
           if (compiler == 'none') {
-            var packageRoot = packageRoot(optionsFromFile['packageRoot']);
-            if (packageRoot != null) {
-              var absolutePath = TestUtils.absolutePath(new Path(packageRoot));
+            var packageRootPath = packageRoot(optionsFromFile['packageRoot']);
+            if (packageRootPath != null) {
+              var absolutePath = 
+                  TestUtils.absolutePath(new Path(packageRootPath));
               packageRootUri = new Uri.fromComponents(
                   scheme: 'file',
                   path: absolutePath.toString());
@@ -1197,11 +1198,11 @@ class StandardTestSuite extends TestSuite {
   }
 
   String packageRootArgument(String packageRootFromFile) {
-    var packageRoot = packageRoot(packageRootFromFile);
-    if (packageRoot == null) {
+    var packageRootPath = packageRoot(packageRootFromFile);
+    if (packageRootPath == null) {
       return null;
     }
-    return "--package-root=$packageRoot";
+    return "--package-root=$packageRootPath";
   }
 
   /**