- Implement Platform.packageRoot and Platform.packageConfig based

tools/full-coverage.dart

Index: tools/full-coverage.dart
diff --git a/tools/full-coverage.dart b/tools/full-coverage.dart
index 29635743f0e8b026faf88713aa895e139e147373..d7ff76f005668bd81aec804d45b25131e9a60723 100644
--- a/tools/full-coverage.dart
+++ b/tools/full-coverage.dart
@@ -462,9 +462,11 @@ parseArgs(List<String> arguments) {
 
   env.pkgRoot = args["package-root"];
   if (env.pkgRoot != null) {
-    env.pkgRoot = absolute(normalize(args["package-root"]));
-    if (!FileSystemEntity.isDirectorySync(env.pkgRoot)) {
-      fail("Provided package root '${args["package-root"]}' is not directory.");
+    var pkgRootUri = Uri.parse(env.pkgRoot);
+    if (pkgRootUri.scheme == "file") {
+      if (!FileSystemEntity.isDirectorySync(pkgRootUri.toFilePath())) {
+        fail("Provided package root '${args["package-root"]}' is not directory.");
+      }
     }
   } else {
     env.pkgRoot = Platform.packageRoot;