Support IE and Safari stack traces.

pkg/stack_trace/lib/src/frame.dart

Index: pkg/stack_trace/lib/src/frame.dart
diff --git a/pkg/stack_trace/lib/src/frame.dart b/pkg/stack_trace/lib/src/frame.dart
index 3db4ab59e76a9f3f6cbc14d1efc29f9c2dbcb88a..b2227370ec42b7414f958796e4288f61537fe5f0 100644
--- a/pkg/stack_trace/lib/src/frame.dart
+++ b/pkg/stack_trace/lib/src/frame.dart
@@ -134,6 +134,12 @@ class Frame {
     }
   }
 
+  /// Parses a string representation of an IE stack frame.
+  ///
+  /// IE10+ frames look just like V8 frames. Prior to IE10, stack traces can't
+  /// be retrieved.
+  factory Frame.parseIE(String frame) => new Frame.parseV8(frame);
+
   /// Parses a string representation of a Firefox stack frame.
   factory Frame.parseFirefox(String frame) {
     var match = _firefoxFrame.firstMatch(frame);
@@ -155,6 +161,12 @@ class Frame {
     return new Frame(uri, int.parse(match[4]), null, member);
   }
 
+  /// Parses a string representation of a Safari stack frame.
+  ///
+  /// Safari 6+ frames look just like Firefox frames. Prior to Safari 6, stack
+  /// traces can't be retrieved.
+  factory Frame.parseSafari(String frame) => new Frame.parseFirefox(frame);
+
   /// Parses this package's string representation of a stack frame.
   factory Frame.parseFriendly(String frame) {
     var match = _friendlyFrame.firstMatch(frame);