Improve the display of data: URIs in stack traces.

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//1320393003 .

pkgs/stack_trace/CHANGELOG.md

diff --git a/pkgs/stack_trace/CHANGELOG.md b/pkgs/stack_trace/CHANGELOG.md
index defe093..dae0db6 100644
--- a/pkgs/stack_trace/CHANGELOG.md
+++ b/pkgs/stack_trace/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 1.4.2
+
+* Improve the display of `data:` URIs in stack traces.
+
 ## 1.4.1
 
 * Fix a crashing bug in `UnparsedFrame.toString()`.

pkgs/stack_trace/lib/src/frame.dart

diff --git a/pkgs/stack_trace/lib/src/frame.dart b/pkgs/stack_trace/lib/src/frame.dart
index 072983a..4077c7c 100644
--- a/pkgs/stack_trace/lib/src/frame.dart
+++ b/pkgs/stack_trace/lib/src/frame.dart
@@ -95,8 +95,11 @@
   /// comes from.
   ///
   /// This will usually be the string form of [uri], but a relative URI will be
-  /// used if possible.
-  String get library => path.prettyUri(uri);
+  /// used if possible. Data URIs will be truncated.
+  String get library {
+    if (uri.scheme == 'data') return "data:...";
+    return path.prettyUri(uri);
+  }
 
   /// Returns the name of the package this stack frame comes from, or `null` if
   /// this stack frame doesn't come from a `package:` URL.

pkgs/stack_trace/pubspec.yaml

diff --git a/pkgs/stack_trace/pubspec.yaml b/pkgs/stack_trace/pubspec.yaml
index 7274bcc..5c8b720 100644
--- a/pkgs/stack_trace/pubspec.yaml
+++ b/pkgs/stack_trace/pubspec.yaml
@@ -7,7 +7,7 @@
 #
 # When the major version is upgraded, you *must* update that version constraint
 # in pub to stay in sync with this.
-version: 1.4.1
+version: 1.4.2
 author: "Dart Team <misc@dartlang.org>"
 homepage: http://github.com/dart-lang/stack_trace
 description: >

pkgs/stack_trace/test/frame_test.dart

diff --git a/pkgs/stack_trace/test/frame_test.dart b/pkgs/stack_trace/test/frame_test.dart
index 1233cbf..63035e0 100644
--- a/pkgs/stack_trace/test/frame_test.dart
+++ b/pkgs/stack_trace/test/frame_test.dart
@@ -503,6 +503,12 @@
       expect(new Frame.parseVM('#0 Foo (foo/bar.dart:0:0)').library,
           equals(path.join('foo', 'bar.dart')));
     });
+
+    test('truncates data: URIs', () {
+      var frame = new Frame.parseVM(
+          '#0 Foo (data:application/dart;charset=utf-8,blah:0:0)');
+      expect(frame.library, equals('data:...'));
+    });
   });
 
   group('.location', () {