Redo "Make dart2js typed_data implementation classes private"

sdk/lib/typed_data/dart2js/native_typed_data_dart2js.dart

Index: sdk/lib/typed_data/dart2js/native_typed_data_dart2js.dart
diff --git a/sdk/lib/typed_data/dart2js/typed_data_dart2js.dart b/sdk/lib/typed_data/dart2js/native_typed_data_dart2js.dart
similarity index 76%
copy from sdk/lib/typed_data/dart2js/typed_data_dart2js.dart
copy to sdk/lib/typed_data/dart2js/native_typed_data_dart2js.dart
index c237962a66abed340cea09ac9cbf129331836c34..a69c406ba8b7409f90c6eedd10a44597708ce42d 100644
--- a/sdk/lib/typed_data/dart2js/typed_data_dart2js.dart
+++ b/sdk/lib/typed_data/dart2js/native_typed_data_dart2js.dart
@@ -6,7 +6,7 @@
  * Specialized integers and floating point numbers,
  * with SIMD support and efficient lists.
  */
-library dart.typed_data;
+library dart.typed_data.implementation;
 
 import 'dart:collection';
 import 'dart:_collection-dev';
@@ -37,20 +37,50 @@ class Endianness {
  * Used to process large quantities of binary or numerical data
  * more efficiently using a typed view.
  */
-class ByteBuffer native "ArrayBuffer" {
+abstract class ByteBuffer {
+  int get lengthInBytes;
+}
+
+class NativeByteBuffer implements ByteBuffer native "ArrayBuffer" {
   @JSName('byteLength')
   final int lengthInBytes;
+
+  Type get runtimeType => ByteBuffer;
 }
 
 /**
  * A typed view of a sequence of bytes.
  */
-class TypedData native "ArrayBufferView" {
+abstract class TypedData {
   /**
    * Returns the byte buffer associated with this object.
    */
-  @Creates('ByteBuffer')
-  @Returns('ByteBuffer|Null')
+  ByteBuffer get buffer;
+
+  /**
+   * Returns the length of this view, in bytes.
+   */
+  int get lengthInBytes;
+
+  /**
+   * Returns the offset in bytes into the underlying byte buffer of this view.
+   */
+  int get offsetInBytes;
+
+  /**
+   * Returns the number of bytes in the representation of each element in this
+   * list.
+   */
+  int get elementSizeInBytes;
+}
+
+class NativeTypedData implements TypedData native "ArrayBufferView" {
+  /**
+   * Returns the byte buffer associated with this object.
+   */
+  @Creates('NativeByteBuffer')
+  // May be Null for IE's CanvasPixelArray.
+  @Returns('NativeByteBuffer|Null')
   final ByteBuffer buffer;
 
   /**
@@ -113,7 +143,7 @@ int _checkLength(length) {
 // (e.g. String arguments) or create typed data objects that are not actually
 // views of the input.
 void _checkViewArguments(buffer, offsetInBytes, length) {
-  if (buffer is! ByteBuffer) {
+  if (buffer is! NativeByteBuffer) {
     throw new ArgumentError('Invalid view buffer');
   }
   if (offsetInBytes is! int) {
@@ -155,12 +185,12 @@ List _ensureNativeList(List list) {
  *     bdata.setFloat32(0, 3.04);
  *     int huh = bdata.getInt32(0);
  */
-class ByteData extends TypedData native "DataView" {
+abstract class ByteData extends TypedData {
   /**
    * Creates a [ByteData] of the specified length (in elements), all of
    * whose elements are initially zero.
    */
-  factory ByteData(int length) => _create1(_checkLength(length));
+  factory ByteData(int length) => new NativeByteData(length);
 
   /**
    * Creates an [ByteData] _view_ of the specified region in the specified
@@ -175,13 +205,279 @@ class ByteData extends TypedData native "DataView" {
    * the length of [buffer].
    */
   factory ByteData.view(ByteBuffer buffer,
-                        [int offsetInBytes = 0, int length]) {
+                        [int offsetInBytes = 0, int length]) =>
+      new NativeByteData.view(buffer, offsetInBytes, length);
+
+  int get elementSizeInBytes => 1;
+
+  /**
+   * Returns the floating point number represented by the four bytes at
+   * the specified [byteOffset] in this object, in IEEE 754
+   * single-precision binary floating-point format (binary32).
+   *
+   * Throws [RangeError] if [byteOffset] is negative, or
+   * `byteOffset + 4` is greater than the length of this object.
+   */
+  num getFloat32(int byteOffset, [Endianness endian=Endianness.BIG_ENDIAN]);
+
+  /**
+   * Returns the floating point number represented by the eight bytes at
+   * the specified [byteOffset] in this object, in IEEE 754
+   * double-precision binary floating-point format (binary64).
+   *
+   * Throws [RangeError] if [byteOffset] is negative, or
+   * `byteOffset + 8` is greater than the length of this object.
+   */
+  num getFloat64(int byteOffset, [Endianness endian=Endianness.BIG_ENDIAN]);
+
+  /**
+   * Returns the (possibly negative) integer represented by the two bytes at
+   * the specified [byteOffset] in this object, in two's complement binary
+   * form.
+   * The return value will be between 2<sup>15</sup> and 2<sup>15</sup> - 1,
+   * inclusive.
+   *
+   * Throws [RangeError] if [byteOffset] is negative, or
+   * `byteOffset + 2` is greater than the length of this object.
+   */
+  int getInt16(int byteOffset, [Endianness endian=Endianness.BIG_ENDIAN]);
+
+  /**
+   * Returns the (possibly negative) integer represented by the four bytes at
+   * the specified [byteOffset] in this object, in two's complement binary
+   * form.
+   * The return value will be between 2<sup>31</sup> and 2<sup>31</sup> - 1,
+   * inclusive.
+   *
+   * Throws [RangeError] if [byteOffset] is negative, or
+   * `byteOffset + 4` is greater than the length of this object.
+   */
+  int getInt32(int byteOffset, [Endianness endian=Endianness.BIG_ENDIAN]);
+
+  /**
+   * Returns the (possibly negative) integer represented by the eight bytes at
+   * the specified [byteOffset] in this object, in two's complement binary
+   * form.
+   * The return value will be between 2<sup>63</sup> and 2<sup>63</sup> - 1,
+   * inclusive.
+   *
+   * Throws [RangeError] if [byteOffset] is negative, or
+   * `byteOffset + 8` is greater than the length of this object.
+   */
+  int getInt64(int byteOffset, [Endianness endian=Endianness.BIG_ENDIAN]);
+
+  /**
+   * Returns the (possibly negative) integer represented by the byte at the
+   * specified [byteOffset] in this object, in two's complement binary
+   * representation. The return value will be between -128 and 127, inclusive.
+   *
+   * Throws [RangeError] if [byteOffset] is negative, or
+   * greater than or equal to the length of this object.
+   */
+  int getInt8(int byteOffset) ;
+
+  /**
+   * Returns the positive integer represented by the two bytes starting
+   * at the specified [byteOffset] in this object, in unsigned binary
+   * form.
+   * The return value will be between 0 and  2<sup>16</sup> - 1, inclusive.
+   *
+   * Throws [RangeError] if [byteOffset] is negative, or
+   * `byteOffset + 2` is greater than the length of this object.
+   */
+  int getUint16(int byteOffset, [Endianness endian=Endianness.BIG_ENDIAN]);
+
+  /**
+   * Returns the positive integer represented by the four bytes starting
+   * at the specified [byteOffset] in this object, in unsigned binary
+   * form.
+   * The return value will be between 0 and  2<sup>32</sup> - 1, inclusive.
+   *
+   * Throws [RangeError] if [byteOffset] is negative, or
+   * `byteOffset + 4` is greater than the length of this object.
+   */
+  int getUint32(int byteOffset, [Endianness endian=Endianness.BIG_ENDIAN]);
+
+  /**
+   * Returns the positive integer represented by the eight bytes starting
+   * at the specified [byteOffset] in this object, in unsigned binary
+   * form.
+   * The return value will be between 0 and  2<sup>64</sup> - 1, inclusive.
+   *
+   * Throws [RangeError] if [byteOffset] is negative, or
+   * `byteOffset + 8` is greater than the length of this object.
+   */
+  int getUint64(int byteOffset, [Endianness endian=Endianness.BIG_ENDIAN]);
+
+  /**
+   * Returns the positive integer represented by the byte at the specified
+   * [byteOffset] in this object, in unsigned binary form. The
+   * return value will be between 0 and 255, inclusive.
+   *
+   * Throws [RangeError] if [byteOffset] is negative, or
+   * greater than or equal to the length of this object.
+   */
+  int getUint8(int byteOffset);
+
+  /**
+   * Sets the four bytes starting at the specified [byteOffset] in this
+   * object to the IEEE 754 single-precision binary floating-point
+   * (binary32) representation of the specified [value].
+   *
+   * **Note that this method can lose precision.** The input [value] is
+   * a 64-bit floating point value, which will be converted to 32-bit
+   * floating point value by IEEE 754 rounding rules before it is stored.
+   * If [value] cannot be represented exactly as a binary32, it will be
+   * converted to the nearest binary32 value.  If two binary32 values are
+   * equally close, the one whose least significant bit is zero will be used.
+   * Note that finite (but large) values can be converted to infinity, and
+   * small non-zero values can be converted to zero.
+   *
+   * Throws [RangeError] if [byteOffset] is negative, or
+   * `byteOffset + 4` is greater than the length of this object.
+   */
+  void setFloat32(int byteOffset, num value,
+                  [Endianness endian=Endianness.BIG_ENDIAN]);
+
+  /**
+   * Sets the eight bytes starting at the specified [byteOffset] in this
+   * object to the IEEE 754 double-precision binary floating-point
+   * (binary64) representation of the specified [value].
+   *
+   * Throws [RangeError] if [byteOffset] is negative, or
+   * `byteOffset + 8` is greater than the length of this object.
+   */
+  void setFloat64(int byteOffset, num value,
+                  [Endianness endian=Endianness.BIG_ENDIAN]);
+
+  /**
+   * Sets the two bytes starting at the specified [byteOffset] in this
+   * object to the two's complement binary representation of the specified
+   * [value], which must fit in two bytes. In other words, [value] must lie
+   * between 2<sup>15</sup> and 2<sup>15</sup> - 1, inclusive.
+   *
+   * Throws [RangeError] if [byteOffset] is negative, or
+   * `byteOffset + 2` is greater than the length of this object.
+   */
+  void setInt16(int byteOffset, int value,
+                [Endianness endian=Endianness.BIG_ENDIAN]);
+
+  /**
+   * Sets the four bytes starting at the specified [byteOffset] in this
+   * object to the two's complement binary representation of the specified
+   * [value], which must fit in four bytes. In other words, [value] must lie
+   * between 2<sup>31</sup> and 2<sup>31</sup> - 1, inclusive.
+   *
+   * Throws [RangeError] if [byteOffset] is negative, or
+   * `byteOffset + 4` is greater than the length of this object.
+   */
+  void setInt32(int byteOffset, int value,
+                [Endianness endian=Endianness.BIG_ENDIAN]);
+
+  /**
+   * Sets the eight bytes starting at the specified [byteOffset] in this
+   * object to the two's complement binary representation of the specified
+   * [value], which must fit in eight bytes. In other words, [value] must lie
+   * between 2<sup>63</sup> and 2<sup>63</sup> - 1, inclusive.
+   *
+   * Throws [RangeError] if [byteOffset] is negative, or
+   * `byteOffset + 8` is greater than the length of this object.
+   */
+  void setInt64(int byteOffset, int value,
+                [Endianness endian=Endianness.BIG_ENDIAN]);
+
+  /**
+   * Sets the byte at the specified [byteOffset] in this object to the
+   * two's complement binary representation of the specified [value], which
+   * must fit in a single byte. In other words, [value] must be between
+   * -128 and 127, inclusive.
+   *
+   * Throws [RangeError] if [byteOffset] is negative, or
+   * greater than or equal to the length of this object.
+   */
+  void setInt8(int byteOffset, int value);
+
+  /**
+   * Sets the two bytes starting at the specified [byteOffset] in this object
+   * to the unsigned binary representation of the specified [value],
+   * which must fit in two bytes. in other words, [value] must be between
+   * 0 and 2<sup>16</sup> - 1, inclusive.
+   *
+   * Throws [RangeError] if [byteOffset] is negative, or
+   * `byteOffset + 2` is greater than the length of this object.
+   */
+  void setUint16(int byteOffset, int value,
+                 [Endianness endian=Endianness.BIG_ENDIAN]);
+
+  /**
+   * Sets the four bytes starting at the specified [byteOffset] in this object
+   * to the unsigned binary representation of the specified [value],
+   * which must fit in four bytes. in other words, [value] must be between
+   * 0 and 2<sup>32</sup> - 1, inclusive.
+   *
+   * Throws [RangeError] if [byteOffset] is negative, or
+   * `byteOffset + 4` is greater than the length of this object.
+   */
+  void setUint32(int byteOffset, int value,
+                 [Endianness endian=Endianness.BIG_ENDIAN]);
+
+  /**
+   * Sets the eight bytes starting at the specified [byteOffset] in this object
+   * to the unsigned binary representation of the specified [value],
+   * which must fit in eight bytes. in other words, [value] must be between
+   * 0 and 2<sup>64</sup> - 1, inclusive.
+   *
+   * Throws [RangeError] if [byteOffset] is negative, or
+   * `byteOffset + 8` is greater than the length of this object.
+   */
+  void setUint64(int byteOffset, int value,
+                 [Endianness endian=Endianness.BIG_ENDIAN]);
+
+  /**
+   * Sets the byte at the specified [byteOffset] in this object to the
+   * unsigned binary representation of the specified [value], which must fit
+   * in a single byte. in other words, [value] must be between 0 and 255,
+   * inclusive.
+   *
+   * Throws [RangeError] if [byteOffset] is negative,
+   * or greater than or equal to the length of this object.
+   */
+  void setUint8(int byteOffset, int value);
+}
+
+
+class NativeByteData extends NativeTypedData implements ByteData
+    native "DataView" {
+  /**
+   * Creates a [ByteData] of the specified length (in elements), all of
+   * whose elements are initially zero.
+   */
+  factory NativeByteData(int length) => _create1(_checkLength(length));
+
+  /**
+   * Creates an [ByteData] _view_ of the specified region in the specified
+   * byte buffer. Changes in the [ByteData] will be visible in the byte
+   * buffer and vice versa. If the [offsetInBytes] index of the region is not
+   * specified, it defaults to zero (the first byte in the byte buffer).
+   * If the length is not specified, it defaults to null, which indicates
+   * that the view extends to the end of the byte buffer.
+   *
+   * Throws [RangeError] if [offsetInBytes] or [length] are negative, or
+   * if [offsetInBytes] + ([length] * elementSizeInBytes) is greater than
+   * the length of [buffer].
+   */
+  factory NativeByteData.view(ByteBuffer buffer,
+                              [int offsetInBytes = 0, int length]) {
     _checkViewArguments(buffer, offsetInBytes, length);
     return length == null
         ? _create2(buffer, offsetInBytes)
         : _create3(buffer, offsetInBytes, length);
   }
 
+  Type get runtimeType => ByteData;
+
+  int get elementSizeInBytes => 1;
+
   /**
    * Returns the floating point number represented by the four bytes at
    * the specified [byteOffset] in this object, in IEEE 754
@@ -193,8 +489,6 @@ class ByteData extends TypedData native "DataView" {
   num getFloat32(int byteOffset, [Endianness endian=Endianness.BIG_ENDIAN]) =>
       _getFloat32(byteOffset, endian._littleEndian);
 
-  int get elementSizeInBytes => 1;
-
   @JSName('getFloat32')
   @Returns('num')
   num _getFloat32(int byteOffset, [bool littleEndian]) native;
@@ -344,7 +638,8 @@ class ByteData extends TypedData native "DataView" {
    * Throws [RangeError] if [byteOffset] is negative, or
    * `byteOffset + 4` is greater than the length of this object.
    */
-  void setFloat32(int byteOffset, num value, [Endianness endian=Endianness.BIG_ENDIAN]) =>
+  void setFloat32(int byteOffset, num value,
+                  [Endianness endian=Endianness.BIG_ENDIAN]) =>
       _setFloat32(byteOffset, value, endian._littleEndian);
 
   @JSName('setFloat32')
@@ -358,7 +653,8 @@ class ByteData extends TypedData native "DataView" {
    * Throws [RangeError] if [byteOffset] is negative, or
    * `byteOffset + 8` is greater than the length of this object.
    */
-  void setFloat64(int byteOffset, num value, [Endianness endian=Endianness.BIG_ENDIAN]) =>
+  void setFloat64(int byteOffset, num value,
+                  [Endianness endian=Endianness.BIG_ENDIAN]) =>
       _setFloat64(byteOffset, value, endian._littleEndian);
 
   @JSName('setFloat64')
@@ -373,7 +669,8 @@ class ByteData extends TypedData native "DataView" {
    * Throws [RangeError] if [byteOffset] is negative, or
    * `byteOffset + 2` is greater than the length of this object.
    */
-  void setInt16(int byteOffset, int value, [Endianness endian=Endianness.BIG_ENDIAN]) =>
+  void setInt16(int byteOffset, int value,
+                [Endianness endian=Endianness.BIG_ENDIAN]) =>
       _setInt16(byteOffset, value, endian._littleEndian);
 
   @JSName('setInt16')
@@ -388,7 +685,8 @@ class ByteData extends TypedData native "DataView" {
    * Throws [RangeError] if [byteOffset] is negative, or
    * `byteOffset + 4` is greater than the length of this object.
    */
-  void setInt32(int byteOffset, int value, [Endianness endian=Endianness.BIG_ENDIAN]) =>
+  void setInt32(int byteOffset, int value,
+                [Endianness endian=Endianness.BIG_ENDIAN]) =>
       _setInt32(byteOffset, value, endian._littleEndian);
 
   @JSName('setInt32')
@@ -403,7 +701,8 @@ class ByteData extends TypedData native "DataView" {
    * Throws [RangeError] if [byteOffset] is negative, or
    * `byteOffset + 8` is greater than the length of this object.
    */
-  void setInt64(int byteOffset, int value, [Endianness endian=Endianness.BIG_ENDIAN]) {
+  void setInt64(int byteOffset, int value,
+                [Endianness endian=Endianness.BIG_ENDIAN]) {
     throw new UnsupportedError("Int64 accessor not supported by dart2js.");
   }
 
@@ -427,7 +726,8 @@ class ByteData extends TypedData native "DataView" {
    * Throws [RangeError] if [byteOffset] is negative, or
    * `byteOffset + 2` is greater than the length of this object.
    */
-  void setUint16(int byteOffset, int value, [Endianness endian=Endianness.BIG_ENDIAN]) =>
+  void setUint16(int byteOffset, int value,
+                 [Endianness endian=Endianness.BIG_ENDIAN]) =>
       _setUint16(byteOffset, value, endian._littleEndian);
 
   @JSName('setUint16')
@@ -442,7 +742,8 @@ class ByteData extends TypedData native "DataView" {
    * Throws [RangeError] if [byteOffset] is negative, or
    * `byteOffset + 4` is greater than the length of this object.
    */
-  void setUint32(int byteOffset, int value, [Endianness endian=Endianness.BIG_ENDIAN]) =>
+  void setUint32(int byteOffset, int value,
+                 [Endianness endian=Endianness.BIG_ENDIAN]) =>
       _setUint32(byteOffset, value, endian._littleEndian);
 
   @JSName('setUint32')
@@ -457,7 +758,8 @@ class ByteData extends TypedData native "DataView" {
    * Throws [RangeError] if [byteOffset] is negative, or
    * `byteOffset + 8` is greater than the length of this object.
    */
-  void setUint64(int byteOffset, int value, [Endianness endian=Endianness.BIG_ENDIAN]) {
+  void setUint64(int byteOffset, int value,
+                 [Endianness endian=Endianness.BIG_ENDIAN]) {
     throw new UnsupportedError("Uint64 accessor not supported by dart2js.");
   }
 
@@ -472,26 +774,26 @@ class ByteData extends TypedData native "DataView" {
    */
   void setUint8(int byteOffset, int value) native;
 
-  static ByteData _create1(arg) =>
-      JS('ByteData', 'new DataView(new ArrayBuffer(#))', arg);
+  static NativeByteData _create1(arg) =>
+      JS('NativeByteData', 'new DataView(new ArrayBuffer(#))', arg);
 
-  static ByteData _create2(arg1, arg2) =>
-      JS('ByteData', 'new DataView(#, #)', arg1, arg2);
+  static NativeByteData _create2(arg1, arg2) =>
+      JS('NativeByteData', 'new DataView(#, #)', arg1, arg2);
 
-  static ByteData _create3(arg1, arg2, arg3) =>
-      JS('ByteData', 'new DataView(#, #, #)', arg1, arg2, arg3);
+  static NativeByteData _create3(arg1, arg2, arg3) =>
+      JS('NativeByteData', 'new DataView(#, #, #)', arg1, arg2, arg3);
 }
 
 
 // TODO(sra): Move this type to a public name in a private library so that other
 // platform libraries like dart:html and dart:webaudio can tell a native array
 // from a list that implements the implicit interface.
-abstract class _NativeTypedArray extends TypedData
+abstract class NativeTypedArray extends NativeTypedData
     implements JavaScriptIndexingBehavior {
   int get length => JS("JSUInt32", '#.length', this);
 
   bool _setRangeFast(int start, int end,
-      _NativeTypedArray source, int skipCount) {
+      NativeTypedArray source, int skipCount) {
     int targetLength = this.length;
     _checkIndex(start, targetLength + 1);
     _checkIndex(end, targetLength + 1);
@@ -514,15 +816,15 @@ abstract class _NativeTypedArray extends TypedData
   }
 }
 
-// TODO(sra): Move to private library, like [_NativeTypedArray].
-abstract class _NativeTypedArrayOfDouble
-    extends _NativeTypedArray
+// TODO(sra): Move to private library, like [NativeTypedArray].
+abstract class NativeTypedArrayOfDouble
+    extends NativeTypedArray
         with ListMixin<double>, FixedLengthListMixin<double>
     implements List<double> {
 
   void setRange(int start, int end, Iterable<double> iterable,
                 [int skipCount = 0]) {
-    if (iterable is _NativeTypedArrayOfDouble) {
+    if (iterable is NativeTypedArrayOfDouble) {
       _setRangeFast(start, end, iterable, skipCount);
       return;
     }
@@ -530,15 +832,15 @@ abstract class _NativeTypedArrayOfDouble
   }
 }
 
-// TODO(sra): Move to private library, like [_NativeTypedArray].
-abstract class _NativeTypedArrayOfInt
-    extends _NativeTypedArray
+// TODO(sra): Move to private library, like [NativeTypedArray].
+abstract class NativeTypedArrayOfInt
+    extends NativeTypedArray
         with ListMixin<int>, FixedLengthListMixin<int>
     implements List<int> {
 
   void setRange(int start, int end, Iterable<int> iterable,
                 [int skipCount = 0]) {
-    if (iterable is _NativeTypedArrayOfInt) {
+    if (iterable is NativeTypedArrayOfInt) {
       _setRangeFast(start, end, iterable, skipCount);
       return;
     }
@@ -553,19 +855,19 @@ abstract class _NativeTypedArrayOfInt
  * implementation can be considerably more space- and time-efficient than
  * the default [List] implementation.
  */
-class Float32List extends _NativeTypedArrayOfDouble native "Float32Array" {
+abstract class Float32List implements TypedData, List<double> {
   /**
    * Creates a [Float32List] of the specified length (in elements), all of
    * whose elements are initially zero.
    */
-  factory Float32List(int length) => _create1(_checkLength(length));
+  factory Float32List(int length) = NativeFloat32List;
 
   /**
    * Creates a [Float32List] with the same size as the [elements] list
    * and copies over the elements.
    */
-  factory Float32List.fromList(List<double> list) =>
-      _create1(_ensureNativeList(list));
+  factory Float32List.fromList(List<double> elements) =>
+      new NativeFloat32List.fromList(elements);
 
   /**
    * Creates a [Float32List] _view_ of the specified region in the specified
@@ -583,14 +885,31 @@ class Float32List extends _NativeTypedArrayOfDouble native "Float32Array" {
    * BYTES_PER_ELEMENT.
    */
   factory Float32List.view(ByteBuffer buffer,
-                           [int offsetInBytes = 0, int length]) {
+                           [int offsetInBytes = 0, int length]) =>
+      new NativeFloat32List.view(buffer, offsetInBytes, length);
+
+  static const int BYTES_PER_ELEMENT = 4;
+}
+
+class NativeFloat32List
+    extends NativeTypedArrayOfDouble
+    implements Float32List
+    native "Float32Array" {
+
+  factory NativeFloat32List(int length) => _create1(_checkLength(length));
+
+  factory NativeFloat32List.fromList(List<double> elements) =>
+      _create1(_ensureNativeList(elements));
+
+  factory NativeFloat32List.view(ByteBuffer buffer,
+                                 int offsetInBytes, int length) {
     _checkViewArguments(buffer, offsetInBytes, length);
     return length == null
         ? _create2(buffer, offsetInBytes)
         : _create3(buffer, offsetInBytes, length);
   }
 
-  static const int BYTES_PER_ELEMENT = 4;
+  Type get runtimeType => Float32List;
 
   num operator[](int index) {
     _checkIndex(index, length);
@@ -604,18 +923,18 @@ class Float32List extends _NativeTypedArrayOfDouble native "Float32Array" {
 
   List<double> sublist(int start, [int end]) {
     end = _checkSublistArguments(start, end, length);
-    var source = JS('Float32List', '#.subarray(#, #)', this, start, end);
+    var source = JS('NativeFloat32List', '#.subarray(#, #)', this, start, end);
     return _create1(source);
   }
 
-  static Float32List _create1(arg) =>
-      JS('Float32List', 'new Float32Array(#)', arg);
+  static NativeFloat32List _create1(arg) =>
+      JS('NativeFloat32List', 'new Float32Array(#)', arg);
 
-  static Float32List _create2(arg1, arg2) =>
-      JS('Float32List', 'new Float32Array(#, #)', arg1, arg2);
+  static NativeFloat32List _create2(arg1, arg2) =>
+      JS('NativeFloat32List', 'new Float32Array(#, #)', arg1, arg2);
 
-  static Float32List _create3(arg1, arg2, arg3) =>
-      JS('Float32List', 'new Float32Array(#, #, #)', arg1, arg2, arg3);
+  static NativeFloat32List _create3(arg1, arg2, arg3) =>
+      JS('NativeFloat32List', 'new Float32Array(#, #, #)', arg1, arg2, arg3);
 }
 
 
@@ -625,19 +944,19 @@ class Float32List extends _NativeTypedArrayOfDouble native "Float32Array" {
  * implementation can be considerably more space- and time-efficient than
  * the default [List] implementation.
  */
-class Float64List extends _NativeTypedArrayOfDouble native "Float64Array" {
+abstract class Float64List implements TypedData, List<double> {
   /**
    * Creates a [Float64List] of the specified length (in elements), all of
    * whose elements are initially zero.
    */
-  factory Float64List(int length) => _create1(_checkLength(length));
+  factory Float64List(int length) = NativeFloat64List;
 
   /**
    * Creates a [Float64List] with the same size as the [elements] list
    * and copies over the elements.
    */
-  factory Float64List.fromList(List<double> list) =>
-      _create1(_ensureNativeList(list));
+  factory Float64List.fromList(List<double> elements) =>
+      new NativeFloat64List.fromList(elements);
 
   /**
    * Creates a [Float64List] _view_ of the specified region in the specified
@@ -655,14 +974,31 @@ class Float64List extends _NativeTypedArrayOfDouble native "Float64Array" {
    * BYTES_PER_ELEMENT.
    */
   factory Float64List.view(ByteBuffer buffer,
-                           [int offsetInBytes = 0, int length]) {
+                           [int offsetInBytes = 0, int length]) =>
+      new NativeFloat64List.view(buffer, offsetInBytes, length);
+
+  static const int BYTES_PER_ELEMENT = 8;
+}
+
+class NativeFloat64List
+    extends NativeTypedArrayOfDouble
+    implements Float64List
+    native "Float64Array" {
+
+  factory NativeFloat64List(int length) => _create1(_checkLength(length));
+
+  factory NativeFloat64List.fromList(List<double> elements) =>
+      _create1(_ensureNativeList(elements));
+
+  factory NativeFloat64List.view(ByteBuffer buffer,
+                                  int offsetInBytes, int length) {
     _checkViewArguments(buffer, offsetInBytes, length);
     return length == null
         ? _create2(buffer, offsetInBytes)
         : _create3(buffer, offsetInBytes, length);
   }
 
-  static const int BYTES_PER_ELEMENT = 8;
+  Type get runtimeType => Float64List;
 
   num operator[](int index) {
     _checkIndex(index, length);
@@ -676,21 +1012,18 @@ class Float64List extends _NativeTypedArrayOfDouble native "Float64Array" {
 
   List<double> sublist(int start, [int end]) {
     end = _checkSublistArguments(start, end, length);
-    var source = JS('Float64List', '#.subarray(#, #)', this, start, end);
+    var source = JS('NativeFloat64List', '#.subarray(#, #)', this, start, end);
     return _create1(source);
   }
 
-  static Float64List _create1(arg) {
-    return JS('Float64List', 'new Float64Array(#)', arg);
-  }
+  static NativeFloat64List _create1(arg) =>
+      JS('NativeFloat64List', 'new Float64Array(#)', arg);
 
-  static Float64List _create2(arg1, arg2) {
-    return JS('Float64List', 'new Float64Array(#, #)', arg1, arg2);
-  }
+  static NativeFloat64List _create2(arg1, arg2) =>
+      JS('NativeFloat64List', 'new Float64Array(#, #)', arg1, arg2);
 
-  static Float64List _create3(arg1, arg2, arg3) {
-    return JS('Float64List', 'new Float64Array(#, #, #)', arg1, arg2, arg3);
-  }
+  static NativeFloat64List _create3(arg1, arg2, arg3) =>
+      JS('NativeFloat64List', 'new Float64Array(#, #, #)', arg1, arg2, arg3);
 }
 
 
@@ -699,19 +1032,19 @@ class Float64List extends _NativeTypedArrayOfDouble native "Float64Array" {
  * [TypedData]. For long lists, this implementation can be considerably
  * more space- and time-efficient than the default [List] implementation.
  */
-class Int16List extends _NativeTypedArrayOfInt native "Int16Array" {
+abstract class Int16List extends TypedData implements List<int> {
   /**
    * Creates an [Int16List] of the specified length (in elements), all of
    * whose elements are initially zero.
    */
-  factory Int16List(int length) => _create1(_checkLength(length));
+  factory Int16List(int length) = NativeInt16List;
 
   /**
    * Creates a [Int16List] with the same size as the [elements] list
    * and copies over the elements.
    */
-  factory Int16List.fromList(List<int> list) =>
-      _create1(_ensureNativeList(list));
+  factory Int16List.fromList(List<int> elements) =>
+      new NativeInt16List.fromList(elements);
 
   /**
    * Creates an [Int16List] _view_ of the specified region in the specified
@@ -729,14 +1062,31 @@ class Int16List extends _NativeTypedArrayOfInt native "Int16Array" {
    * BYTES_PER_ELEMENT.
    */
   factory Int16List.view(ByteBuffer buffer,
-                         [int offsetInBytes = 0, int length]) {
+                         [int offsetInBytes = 0, int length]) =>
+      new NativeInt16List.view(buffer, offsetInBytes, length);
+
+  static const int BYTES_PER_ELEMENT = 2;
+}
+
+class NativeInt16List
+    extends NativeTypedArrayOfInt
+    implements Int16List
+    native "Int16Array" {
+
+  factory NativeInt16List(int length) => _create1(_checkLength(length));
+
+  factory NativeInt16List.fromList(List<int> elements) =>
+      _create1(_ensureNativeList(elements));
+
+  factory NativeInt16List.view(ByteBuffer buffer,
+                                [int offsetInBytes = 0, int length]) {
     _checkViewArguments(buffer, offsetInBytes, length);
     return length == null
         ? _create2(buffer, offsetInBytes)
         : _create3(buffer, offsetInBytes, length);
   }
 
-  static const int BYTES_PER_ELEMENT = 2;
+  Type get runtimeType => Int16List;
 
   int operator[](int index) {
     _checkIndex(index, length);
@@ -750,18 +1100,18 @@ class Int16List extends _NativeTypedArrayOfInt native "Int16Array" {
 
   List<int> sublist(int start, [int end]) {
     end = _checkSublistArguments(start, end, length);
-    var source = JS('Int16List', '#.subarray(#, #)', this, start, end);
+    var source = JS('NativeInt16List', '#.subarray(#, #)', this, start, end);
     return _create1(source);
   }
 
-  static Int16List _create1(arg) =>
-      JS('Int16List', 'new Int16Array(#)', arg);
+  static NativeInt16List _create1(arg) =>
+      JS('NativeInt16List', 'new Int16Array(#)', arg);
 
-  static Int16List _create2(arg1, arg2) =>
-      JS('Int16List', 'new Int16Array(#, #)', arg1, arg2);
+  static NativeInt16List _create2(arg1, arg2) =>
+      JS('NativeInt16List', 'new Int16Array(#, #)', arg1, arg2);
 
-  static Int16List _create3(arg1, arg2, arg3) =>
-      JS('Int16List', 'new Int16Array(#, #, #)', arg1, arg2, arg3);
+  static NativeInt16List _create3(arg1, arg2, arg3) =>
+      JS('NativeInt16List', 'new Int16Array(#, #, #)', arg1, arg2, arg3);
 }
 
 
@@ -770,19 +1120,19 @@ class Int16List extends _NativeTypedArrayOfInt native "Int16Array" {
  * [TypedData]. For long lists, this implementation can be considerably
  * more space- and time-efficient than the default [List] implementation.
  */
-class Int32List extends _NativeTypedArrayOfInt native "Int32Array" {
+abstract class Int32List implements TypedData, List<int> {
   /**
    * Creates an [Int32List] of the specified length (in elements), all of
    * whose elements are initially zero.
    */
-  factory Int32List(int length) => _create1(_checkLength(length));
+  factory Int32List(int length) = NativeInt32List;
 
   /**
    * Creates a [Int32List] with the same size as the [elements] list
    * and copies over the elements.
    */
-  factory Int32List.fromList(List<int> list) =>
-      _create1(_ensureNativeList(list));
+  factory Int32List.fromList(List<int> elements) =>
+      new NativeInt32List.fromList(elements);
 
   /**
    * Creates an [Int32List] _view_ of the specified region in the specified
@@ -800,14 +1150,31 @@ class Int32List extends _NativeTypedArrayOfInt native "Int32Array" {
    * BYTES_PER_ELEMENT.
    */
   factory Int32List.view(ByteBuffer buffer,
-                         [int offsetInBytes = 0, int length]) {
+                         [int offsetInBytes = 0, int length]) =>
+      new NativeInt32List.view(buffer, offsetInBytes, length);
+
+  static const int BYTES_PER_ELEMENT = 4;
+}
+
+class NativeInt32List
+    extends NativeTypedArrayOfInt
+    implements Int32List
+    native "Int32Array" {
+
+  factory NativeInt32List(int length) => _create1(_checkLength(length));
+
+  factory NativeInt32List.fromList(List<int> elements) =>
+      _create1(_ensureNativeList(elements));
+
+  factory NativeInt32List.view(ByteBuffer buffer,
+                                int offsetInBytes, int length) {
     _checkViewArguments(buffer, offsetInBytes, length);
     return length == null
         ? _create2(buffer, offsetInBytes)
         : _create3(buffer, offsetInBytes, length);
   }
 
-  static const int BYTES_PER_ELEMENT = 4;
+  Type get runtimeType => Int32List;
 
   int operator[](int index) {
     _checkIndex(index, length);
@@ -821,18 +1188,18 @@ class Int32List extends _NativeTypedArrayOfInt native "Int32Array" {
 
   List<int> sublist(int start, [int end]) {
     end = _checkSublistArguments(start, end, length);
-    var source = JS('Int32List', '#.subarray(#, #)', this, start, end);
+    var source = JS('NativeInt32List', '#.subarray(#, #)', this, start, end);
     return _create1(source);
   }
 
-  static Int32List _create1(arg) =>
-      JS('Int32List', 'new Int32Array(#)', arg);
+  static NativeInt32List _create1(arg) =>
+      JS('NativeInt32List', 'new Int32Array(#)', arg);
 
-  static Int32List _create2(arg1, arg2) =>
-      JS('Int32List', 'new Int32Array(#, #)', arg1, arg2);
+  static NativeInt32List _create2(arg1, arg2) =>
+      JS('NativeInt32List', 'new Int32Array(#, #)', arg1, arg2);
 
-  static Int32List _create3(arg1, arg2, arg3) =>
-      JS('Int32List', 'new Int32Array(#, #, #)', arg1, arg2, arg3);
+  static NativeInt32List _create3(arg1, arg2, arg3) =>
+      JS('NativeInt32List', 'new Int32Array(#, #, #)', arg1, arg2, arg3);
 }
 
 
@@ -841,19 +1208,19 @@ class Int32List extends _NativeTypedArrayOfInt native "Int32Array" {
  * For long lists, this implementation can be considerably
  * more space- and time-efficient than the default [List] implementation.
  */
-class Int8List extends _NativeTypedArrayOfInt native "Int8Array" {
+abstract class Int8List implements TypedData, List<int> {
   /**
    * Creates an [Int8List] of the specified length (in elements), all of
    * whose elements are initially zero.
    */
-  factory Int8List(int length) => _create1(_checkLength(length));
+  factory Int8List(int length) = NativeInt8List;
 
   /**
    * Creates a [Int8List] with the same size as the [elements] list
    * and copies over the elements.
    */
-  factory Int8List.fromList(List<int> list) =>
-      _create1(_ensureNativeList(list));
+  factory Int8List.fromList(List<int> elements) =>
+      new NativeInt8List.fromList(elements);
 
   /**
    * Creates an [Int8List] _view_ of the specified region in the specified
@@ -868,14 +1235,31 @@ class Int8List extends _NativeTypedArrayOfInt native "Int8Array" {
    * the length of [buffer].
    */
   factory Int8List.view(ByteBuffer buffer,
-                        [int offsetInBytes = 0, int length]) {
+                        [int offsetInBytes = 0, int length])
+      => new NativeInt8List.view(buffer, offsetInBytes, length);
+
+  static const int BYTES_PER_ELEMENT = 1;
+}
+
+class NativeInt8List
+    extends NativeTypedArrayOfInt
+    implements Int8List
+    native "Int8Array" {
+
+  factory NativeInt8List(int length) => _create1(_checkLength(length));
+
+  factory NativeInt8List.fromList(List<int> elements) =>
+      _create1(_ensureNativeList(elements));
+
+  factory NativeInt8List.view(ByteBuffer buffer,
+                               int offsetInBytes, int length) {
     _checkViewArguments(buffer, offsetInBytes, length);
     return length == null
         ? _create2(buffer, offsetInBytes)
         : _create3(buffer, offsetInBytes, length);
   }
 
-  static const int BYTES_PER_ELEMENT = 1;
+  Type get runtimeType => Int8List;
 
   int operator[](int index) {
     _checkIndex(index, length);
@@ -889,18 +1273,18 @@ class Int8List extends _NativeTypedArrayOfInt native "Int8Array" {
 
   List<int> sublist(int start, [int end]) {
     end = _checkSublistArguments(start, end, length);
-    var source = JS('Int8List', '#.subarray(#, #)', this, start, end);
+    var source = JS('NativeInt8List', '#.subarray(#, #)', this, start, end);
     return _create1(source);
   }
 
-  static Int8List _create1(arg) =>
-      JS('Int8List', 'new Int8Array(#)', arg);
+  static NativeInt8List _create1(arg) =>
+      JS('NativeInt8List', 'new Int8Array(#)', arg);
 
-  static Int8List _create2(arg1, arg2) =>
-      JS('Int8List', 'new Int8Array(#, #)', arg1, arg2);
+  static NativeInt8List _create2(arg1, arg2) =>
+      JS('NativeInt8List', 'new Int8Array(#, #)', arg1, arg2);
 
   static Int8List _create3(arg1, arg2, arg3) =>
-      JS('Int8List', 'new Int8Array(#, #, #)', arg1, arg2, arg3);
+      JS('NativeInt8List', 'new Int8Array(#, #, #)', arg1, arg2, arg3);
 }
 
 
@@ -909,19 +1293,19 @@ class Int8List extends _NativeTypedArrayOfInt native "Int8Array" {
  * [TypedData]. For long lists, this implementation can be considerably
  * more space- and time-efficient than the default [List] implementation.
  */
-class Uint16List extends _NativeTypedArrayOfInt native "Uint16Array" {
+abstract class Uint16List implements TypedData, List<int> {
   /**
    * Creates a [Uint16List] of the specified length (in elements), all
    * of whose elements are initially zero.
    */
-  factory Uint16List(int length) => _create1(_checkLength(length));
+  factory Uint16List(int length) = NativeUint16List;
 
   /**
    * Creates a [Uint16List] with the same size as the [elements] list
    * and copies over the elements.
    */
-  factory Uint16List.fromList(List<int> list) =>
-      _create1(_ensureNativeList(list));
+  factory Uint16List.fromList(List<int> elements) =>
+      new NativeUint16List.fromList(elements);
 
   /**
    * Creates a [Uint16List] _view_ of the specified region in
@@ -939,14 +1323,31 @@ class Uint16List extends _NativeTypedArrayOfInt native "Uint16Array" {
    * BYTES_PER_ELEMENT.
    */
   factory Uint16List.view(ByteBuffer buffer,
-                          [int offsetInBytes = 0, int length]) {
+                          [int offsetInBytes = 0, int length]) =>
+      new NativeUint16List.view(buffer, offsetInBytes, length);
+
+  static const int BYTES_PER_ELEMENT = 2;
+}
+
+class NativeUint16List
+    extends NativeTypedArrayOfInt
+    implements Uint16List
+    native "Uint16Array" {
+
+  factory NativeUint16List(int length) => _create1(_checkLength(length));
+
+  factory NativeUint16List.fromList(List<int> list) =>
+      _create1(_ensureNativeList(list));
+
+  factory NativeUint16List.view(ByteBuffer buffer,
+                                 int offsetInBytes, int length) {
     _checkViewArguments(buffer, offsetInBytes, length);
     return length == null
         ? _create2(buffer, offsetInBytes)
         : _create3(buffer, offsetInBytes, length);
   }
 
-  static const int BYTES_PER_ELEMENT = 2;
+  Type get runtimeType => Uint16List;
 
   int operator[](int index) {
     _checkIndex(index, length);
@@ -960,18 +1361,18 @@ class Uint16List extends _NativeTypedArrayOfInt native "Uint16Array" {
 
   List<int> sublist(int start, [int end]) {
     end = _checkSublistArguments(start, end, length);
-    var source = JS('Uint16List', '#.subarray(#, #)', this, start, end);
+    var source = JS('NativeUint16List', '#.subarray(#, #)', this, start, end);
     return _create1(source);
   }
 
-  static Uint16List _create1(arg) =>
-      JS('Uint16List', 'new Uint16Array(#)', arg);
+  static NativeUint16List _create1(arg) =>
+      JS('NativeUint16List', 'new Uint16Array(#)', arg);
 
-  static Uint16List _create2(arg1, arg2) =>
-      JS('Uint16List', 'new Uint16Array(#, #)', arg1, arg2);
+  static NativeUint16List _create2(arg1, arg2) =>
+      JS('NativeUint16List', 'new Uint16Array(#, #)', arg1, arg2);
 
-  static Uint16List _create3(arg1, arg2, arg3) =>
-      JS('Uint16List', 'new Uint16Array(#, #, #)', arg1, arg2, arg3);
+  static NativeUint16List _create3(arg1, arg2, arg3) =>
+      JS('NativeUint16List', 'new Uint16Array(#, #, #)', arg1, arg2, arg3);
 }
 
 
@@ -980,19 +1381,19 @@ class Uint16List extends _NativeTypedArrayOfInt native "Uint16Array" {
  * [TypedData]. For long lists, this implementation can be considerably
  * more space- and time-efficient than the default [List] implementation.
  */
-class Uint32List extends _NativeTypedArrayOfInt native "Uint32Array" {
+abstract class Uint32List implements TypedData, List<int> {
   /**
    * Creates a [Uint32List] of the specified length (in elements), all
    * of whose elements are initially zero.
    */
-  factory Uint32List(int length) => _create1(_checkLength(length));
+  factory Uint32List(int length) = NativeUint32List;
 
   /**
    * Creates a [Uint32List] with the same size as the [elements] list
    * and copies over the elements.
    */
-  factory Uint32List.fromList(List<int> list) =>
-      _create1(_ensureNativeList(list));
+  factory Uint32List.fromList(List<int> elements) =>
+      new NativeUint32List.fromList(elements);
 
   /**
    * Creates a [Uint32List] _view_ of the specified region in
@@ -1010,14 +1411,31 @@ class Uint32List extends _NativeTypedArrayOfInt native "Uint32Array" {
    * BYTES_PER_ELEMENT.
    */
   factory Uint32List.view(ByteBuffer buffer,
-                          [int offsetInBytes = 0, int length]) {
+                          [int offsetInBytes = 0, int length]) =>
+      new NativeUint32List.view(buffer, offsetInBytes, length);
+
+  static const int BYTES_PER_ELEMENT = 4;
+}
+
+class NativeUint32List
+    extends NativeTypedArrayOfInt
+    implements Uint32List
+    native "Uint32Array" {
+
+  factory NativeUint32List(int length) => _create1(_checkLength(length));
+
+  factory NativeUint32List.fromList(List<int> elements) =>
+      _create1(_ensureNativeList(elements));
+
+  factory NativeUint32List.view(ByteBuffer buffer,
+                                 int offsetInBytes, int length) {
     _checkViewArguments(buffer, offsetInBytes, length);
     return length == null
         ? _create2(buffer, offsetInBytes)
         : _create3(buffer, offsetInBytes, length);
   }
 
-  static const int BYTES_PER_ELEMENT = 4;
+  Type get runtimeType => Uint32List;
 
   int operator[](int index) {
     _checkIndex(index, length);
@@ -1031,18 +1449,18 @@ class Uint32List extends _NativeTypedArrayOfInt native "Uint32Array" {
 
   List<int> sublist(int start, [int end]) {
     end = _checkSublistArguments(start, end, length);
-    var source = JS('Uint32List', '#.subarray(#, #)', this, start, end);
+    var source = JS('NativeUint32List', '#.subarray(#, #)', this, start, end);
     return _create1(source);
   }
 
-  static Uint32List _create1(arg) =>
-      JS('Uint32List', 'new Uint32Array(#)', arg);
+  static NativeUint32List _create1(arg) =>
+      JS('NativeUint32List', 'new Uint32Array(#)', arg);
 
-  static Uint32List _create2(arg1, arg2) =>
-      JS('Uint32List', 'new Uint32Array(#, #)', arg1, arg2);
+  static NativeUint32List _create2(arg1, arg2) =>
+      JS('NativeUint32List', 'new Uint32Array(#, #)', arg1, arg2);
 
-  static Uint32List _create3(arg1, arg2, arg3) =>
-      JS('Uint32List', 'new Uint32Array(#, #, #)', arg1, arg2, arg3);
+  static NativeUint32List _create3(arg1, arg2, arg3) =>
+      JS('NativeUint32List', 'new Uint32Array(#, #, #)', arg1, arg2, arg3);
 }
 
 
@@ -1052,20 +1470,19 @@ class Uint32List extends _NativeTypedArrayOfInt native "Uint32Array" {
  * more space- and time-efficient than the default [List] implementation.
  * Indexed store clamps the value to range 0..0xFF.
  */
-class Uint8ClampedList extends _NativeTypedArrayOfInt
-    native "Uint8ClampedArray,CanvasPixelArray" {
+abstract class Uint8ClampedList implements TypedData, List<int> {
   /**
    * Creates a [Uint8ClampedList] of the specified length (in elements), all of
    * whose elements are initially zero.
    */
-  factory Uint8ClampedList(int length) => _create1(_checkLength(length));
+  factory Uint8ClampedList(int length) = NativeUint8ClampedList;
 
   /**
    * Creates a [Uint8ClampedList] of the same size as the [elements]
    * list and copies over the values clamping when needed.
    */
-  factory Uint8ClampedList.fromList(List<int> list) =>
-      _create1(_ensureNativeList(list));
+  factory Uint8ClampedList.fromList(List<int> elements) =>
+      new NativeUint8ClampedList.fromList(_ensureNativeList(elements));
 
   /**
    * Creates a [Uint8ClampedList] _view_ of the specified region in the
@@ -1080,14 +1497,31 @@ class Uint8ClampedList extends _NativeTypedArrayOfInt
    * the length of [buffer].
    */
   factory Uint8ClampedList.view(ByteBuffer buffer,
-                                [int offsetInBytes = 0, int length]) {
+                                [int offsetInBytes = 0, int length]) =>
+      new NativeUint8ClampedList.view(buffer, offsetInBytes, length);
+
+  static const int BYTES_PER_ELEMENT = 1;
+}
+
+class NativeUint8ClampedList
+    extends NativeTypedArrayOfInt
+    implements Uint8ClampedList
+    native "Uint8ClampedArray,CanvasPixelArray" {
+
+  factory NativeUint8ClampedList(int length) => _create1(_checkLength(length));
+
+  factory NativeUint8ClampedList.fromList(List<int> elements) =>
+      _create1(_ensureNativeList(elements));
+
+  factory NativeUint8ClampedList.view(ByteBuffer buffer,
+                                       int offsetInBytes, int length) {
     _checkViewArguments(buffer, offsetInBytes, length);
     return length == null
         ? _create2(buffer, offsetInBytes)
         : _create3(buffer, offsetInBytes, length);
   }
 
-  static const int BYTES_PER_ELEMENT = 1;
+  Type get runtimeType => Uint8ClampedList;
 
   int get length => JS("JSUInt32", '#.length', this);
 
@@ -1103,18 +1537,19 @@ class Uint8ClampedList extends _NativeTypedArrayOfInt
 
   List<int> sublist(int start, [int end]) {
     end = _checkSublistArguments(start, end, length);
-    var source = JS('Uint8ClampedList', '#.subarray(#, #)', this, start, end);
+    var source = JS('NativeUint8ClampedList', '#.subarray(#, #)',
+        this, start, end);
     return _create1(source);
   }
 
-  static Uint8ClampedList _create1(arg) =>
-      JS('Uint8ClampedList', 'new Uint8ClampedArray(#)', arg);
+  static NativeUint8ClampedList _create1(arg) =>
+      JS('NativeUint8ClampedList', 'new Uint8ClampedArray(#)', arg);
 
-  static Uint8ClampedList _create2(arg1, arg2) =>
-      JS('Uint8ClampedList', 'new Uint8ClampedArray(#, #)', arg1, arg2);
+  static NativeUint8ClampedList _create2(arg1, arg2) =>
+      JS('NativeUint8ClampedList', 'new Uint8ClampedArray(#, #)', arg1, arg2);
 
-  static Uint8ClampedList _create3(arg1, arg2, arg3) =>
-      JS('Uint8ClampedList', 'new Uint8ClampedArray(#, #, #)',
+  static NativeUint8ClampedList _create3(arg1, arg2, arg3) =>
+      JS('NativeUint8ClampedList', 'new Uint8ClampedArray(#, #, #)',
          arg1, arg2, arg3);
 }
 
@@ -1124,24 +1559,19 @@ class Uint8ClampedList extends _NativeTypedArrayOfInt
  * For long lists, this implementation can be considerably
  * more space- and time-efficient than the default [List] implementation.
  */
-class Uint8List extends _NativeTypedArrayOfInt
-    // On some browsers Uint8ClampedArray is a subtype of Uint8Array.  Marking
-    // Uint8List as !nonleaf ensures that the native dispatch correctly handles
-    // the potential for Uint8ClampedArray to 'accidentally' pick up the
-    // dispatch record for Uint8List.
-    native "Uint8Array,!nonleaf" {
+abstract class Uint8List implements TypedData, List<int> {
   /**
    * Creates a [Uint8List] of the specified length (in elements), all of
    * whose elements are initially zero.
    */
-  factory Uint8List(int length) => _create1(_checkLength(length));
+  factory Uint8List(int length) = NativeUint8List;
 
   /**
    * Creates a [Uint8List] with the same size as the [elements] list
    * and copies over the elements.
    */
-  factory Uint8List.fromList(List<int> list) =>
-      _create1(_ensureNativeList(list));
+  factory Uint8List.fromList(List<int> elements) =>
+      new NativeUint8List.fromList(elements);
 
   /**
    * Creates a [Uint8List] _view_ of the specified region in the specified
@@ -1156,14 +1586,35 @@ class Uint8List extends _NativeTypedArrayOfInt
    * the length of [buffer].
    */
   factory Uint8List.view(ByteBuffer buffer,
-                         [int offsetInBytes = 0, int length]) {
+                         [int offsetInBytes = 0, int length]) =>
+      new NativeUint8List.view(buffer, offsetInBytes, length);
+
+  static const int BYTES_PER_ELEMENT = 1;
+}
+
+class NativeUint8List
+    extends NativeTypedArrayOfInt
+    implements Uint8List
+    // On some browsers Uint8ClampedArray is a subtype of Uint8Array.  Marking
+    // Uint8List as !nonleaf ensures that the native dispatch correctly handles
+    // the potential for Uint8ClampedArray to 'accidentally' pick up the
+    // dispatch record for Uint8List.
+    native "Uint8Array,!nonleaf" {
+
+  factory NativeUint8List(int length) => _create1(_checkLength(length));
+
+  factory NativeUint8List.fromList(List<int> elements) =>
+      _create1(_ensureNativeList(elements));
+
+  factory NativeUint8List.view(ByteBuffer buffer,
+                                int offsetInBytes, int length) {
     _checkViewArguments(buffer, offsetInBytes, length);
     return length == null
         ? _create2(buffer, offsetInBytes)
         : _create3(buffer, offsetInBytes, length);
   }
 
-  static const int BYTES_PER_ELEMENT = 1;
+  Type get runtimeType => Uint8List;
 
   int get length => JS("JSUInt32", '#.length', this);
 
@@ -1179,18 +1630,18 @@ class Uint8List extends _NativeTypedArrayOfInt
 
   List<int> sublist(int start, [int end]) {
     end = _checkSublistArguments(start, end, length);
-    var source = JS('Uint8List', '#.subarray(#, #)', this, start, end);
+    var source = JS('NativeUint8List', '#.subarray(#, #)', this, start, end);
     return _create1(source);
   }
 
-  static Uint8List _create1(arg) =>
-      JS('Uint8List', 'new Uint8Array(#)', arg);
+  static NativeUint8List _create1(arg) =>
+      JS('NativeUint8List', 'new Uint8Array(#)', arg);
 
-  static Uint8List _create2(arg1, arg2) =>
-      JS('Uint8List', 'new Uint8Array(#, #)', arg1, arg2);
+  static NativeUint8List _create2(arg1, arg2) =>
+      JS('NativeUint8List', 'new Uint8Array(#, #)', arg1, arg2);
 
-  static Uint8List _create3(arg1, arg2, arg3) =>
-      JS('Uint8List', 'new Uint8Array(#, #, #)', arg1, arg2, arg3);
+  static NativeUint8List _create3(arg1, arg2, arg3) =>
+      JS('NativeUint8List', 'new Uint8Array(#, #, #)', arg1, arg2, arg3);
 }
 
 
@@ -1199,8 +1650,7 @@ class Uint8List extends _NativeTypedArrayOfInt
  * [TypedData]. For long lists, this implementation can be considerably
  * more space- and time-efficient than the default [List] implementation.
  */
-abstract class Int64List extends TypedData
-                         implements JavaScriptIndexingBehavior, List<int> {
+abstract class Int64List extends TypedData implements List<int> {
   /**
    * Creates an [Int64List] of the specified length (in elements), all of
    * whose elements are initially zero.
@@ -1245,8 +1695,7 @@ abstract class Int64List extends TypedData
  * [TypedData]. For long lists, this implementation can be considerably
  * more space- and time-efficient than the default [List] implementation.
  */
-abstract class Uint64List extends TypedData
-                          implements JavaScriptIndexingBehavior, List<int> {
+abstract class Uint64List extends TypedData implements List<int> {
   /**
    * Creates a [Uint64List] of the specified length (in elements), all
    * of whose elements are initially zero.
@@ -1344,10 +1793,10 @@ class Float32x4List
       : _storage = new Float32List(list.length * 4) {
     for (int i = 0; i < list.length; i++) {
       var e = list[i];
-      _storage[(i*4)+0] = e.x;
-      _storage[(i*4)+1] = e.y;
-      _storage[(i*4)+2] = e.z;
-      _storage[(i*4)+3] = e.w;
+      _storage[(i * 4) + 0] = e.x;
+      _storage[(i * 4) + 1] = e.y;
+      _storage[(i * 4) + 2] = e.z;
+      _storage[(i * 4) + 3] = e.w;
     }
   }
 
@@ -1390,24 +1839,25 @@ class Float32x4List
 
   Float32x4 operator[](int index) {
     _checkIndex(index, length);
-    double _x = _storage[(index*4)+0];
-    double _y = _storage[(index*4)+1];
-    double _z = _storage[(index*4)+2];
-    double _w = _storage[(index*4)+3];
+    double _x = _storage[(index * 4) + 0];
+    double _y = _storage[(index * 4) + 1];
+    double _z = _storage[(index * 4) + 2];
+    double _w = _storage[(index * 4) + 3];
     return new Float32x4(_x, _y, _z, _w);
   }
 
   void operator[]=(int index, Float32x4 value) {
     _checkIndex(index, length);
-    _storage[(index*4)+0] = value._storage[0];
-    _storage[(index*4)+1] = value._storage[1];
-    _storage[(index*4)+2] = value._storage[2];
-    _storage[(index*4)+3] = value._storage[3];
+    _storage[(index * 4) + 0] = value._storage[0];
+    _storage[(index * 4) + 1] = value._storage[1];
+    _storage[(index * 4) + 2] = value._storage[2];
+    _storage[(index * 4) + 3] = value._storage[3];
   }
 
   List<Float32x4> sublist(int start, [int end]) {
     end = _checkSublistArguments(start, end, length);
-    return new Float32x4List._externalStorage(_storage.sublist(start*4, end*4));
+    return new Float32x4List._externalStorage(
+        _storage.sublist(start * 4, end * 4));
   }
 }
 
@@ -1462,7 +1912,7 @@ class Int32x4List
    * Creates a [Int32x4List] of the specified length (in elements),
    * all of whose elements are initially zero.
    */
-  Int32x4List(int length) : _storage = new Uint32List(length*4);
+  Int32x4List(int length) : _storage = new Uint32List(length * 4);
 
   Int32x4List._externalStorage(Uint32List storage) : _storage = storage;
 
@@ -1470,10 +1920,10 @@ class Int32x4List
       : _storage = new Uint32List(list.length * 4) {
     for (int i = 0; i < list.length; i++) {
       var e = list[i];
-      _storage[(i*4)+0] = e.x;
-      _storage[(i*4)+1] = e.y;
-      _storage[(i*4)+2] = e.z;
-      _storage[(i*4)+3] = e.w;
+      _storage[(i * 4) + 0] = e.x;
+      _storage[(i * 4) + 1] = e.y;
+      _storage[(i * 4) + 2] = e.z;
+      _storage[(i * 4) + 3] = e.w;
     }
   }
 
@@ -1516,19 +1966,19 @@ class Int32x4List
 
   Int32x4 operator[](int index) {
     _checkIndex(index, length);
-    int _x = _storage[(index*4)+0];
-    int _y = _storage[(index*4)+1];
-    int _z = _storage[(index*4)+2];
-    int _w = _storage[(index*4)+3];
+    int _x = _storage[(index * 4) + 0];
+    int _y = _storage[(index * 4) + 1];
+    int _z = _storage[(index * 4) + 2];
+    int _w = _storage[(index * 4) + 3];
     return new Int32x4(_x, _y, _z, _w);
   }
 
   void operator[]=(int index, Int32x4 value) {
     _checkIndex(index, length);
-    _storage[(index*4)+0] = value._storage[0];
-    _storage[(index*4)+1] = value._storage[1];
-    _storage[(index*4)+2] = value._storage[2];
-    _storage[(index*4)+3] = value._storage[3];
+    _storage[(index * 4) + 0] = value._storage[0];
+    _storage[(index * 4) + 1] = value._storage[1];
+    _storage[(index * 4) + 2] = value._storage[2];
+    _storage[(index * 4) + 3] = value._storage[3];
   }
 
   List<Int32x4> sublist(int start, [int end]) {