Add some ArgumentError and RangeError constructors that capture more information.

pkg/typed_data/lib/typed_buffers.dart

Index: pkg/typed_data/lib/typed_buffers.dart
diff --git a/pkg/typed_data/lib/typed_buffers.dart b/pkg/typed_data/lib/typed_buffers.dart
index b8803388084ae126a2102299ffdf9e87b6e518f8..50ed2414c4cbd58d196a720e9706ecf31338a18e 100644
--- a/pkg/typed_data/lib/typed_buffers.dart
+++ b/pkg/typed_data/lib/typed_buffers.dart
@@ -32,12 +32,12 @@ abstract class _TypedDataBuffer<E> extends ListBase<E> {
 
   int get length => _length;
   E operator[](int index) {
-    if (index >= length) throw new RangeError.range(index, 0, length - 1);
+    if (index >= length) throw new RangeError.index(index, this);
     return _buffer[index];
   }
 
   void operator[]=(int index, E value) {
-    if (index >= length) throw new RangeError.range(index, 0, length - 1);
+    if (index >= length) throw new RangeError.index(index, this);
     _buffer[index] = value;
   }