Dev compiler debugger related tweaks.

pkg/dev_compiler/web/main.dart

Index: pkg/dev_compiler/web/main.dart
diff --git a/pkg/dev_compiler/web/main.dart b/pkg/dev_compiler/web/main.dart
index 1480a6589913b64419f033e582ee992ca15cd77f..b7cdea65f64bac591edcbcc4d416bb86db60c930 100755
--- a/pkg/dev_compiler/web/main.dart
+++ b/pkg/dev_compiler/web/main.dart
@@ -23,13 +23,12 @@ main() {
   // Avoid race condition when users try to call $setUpDartDevCompilerInBrowser
   // before it is ready by installing the method immediately and making the body
   // of the method async.
-  setUpCompilerInBrowser = allowInterop((String summaryRoot,
-      String sdkUrl,
-      List<String> summaryUrls,
+  setUpCompilerInBrowser = allowInterop((String sdkUrl,

[Jacob, 2017/04/12 18:24:42]

Remove summaryRoot parameter as it is obsolete and possibly wrong if summaries
are loaded from two different Dart applications on the same page perhaps with
different summary root directories.

+      JSMap<String, String> summaryMap,
       Function onCompileReady,
       Function onError) async {
     (await _setUpCompilerInBrowser)(
-        summaryRoot, sdkUrl, summaryUrls, onCompileReady, onError);
+        sdkUrl, summaryMap, onCompileReady, onError);
   });
   _runCommand(args);
 }