Use identical instead of === and !identical instead of !==

runtime/lib/typeddata.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // patch classes for Int8List ..... Float64List and ByteData implementations.
 
 patch class Int8List {
   /* patch */ factory Int8List(int length) {
     return new _Int8Array(length);
   }
@@ skipping 2864 matching lines @@
       _throwRangeError(byteOffset, length);
     }
     _typeddata._setUint8(_offset + byteOffset, _toUint8(value));
   }
 
   int getInt16(int byteOffset, [Endianness endian = Endianness.BIG_ENDIAN]) {
     if (byteOffset < 0 || byteOffset >= length) {
       _throwRangeError(byteOffset, length);
     }
     var result = _typeddata._getInt16(_offset + byteOffset);
-    if (endian === Endianness.HOST_ENDIAN) {
+    if (identical(endian, Endianness.HOST_ENDIAN)) {
       return result;
     }
     return _toEndianInt16(result, endian._littleEndian);
   }
   void setInt16(int byteOffset,
                 int value,
                 [Endianness endian = Endianness.BIG_ENDIAN]) {
     if (byteOffset < 0 || byteOffset >= length) {
       _throwRangeError(byteOffset, length);
     }
     var set_value = _toInt16(value);
-    if (endian !== Endianness.HOST_ENDIAN) {
+    if (!identical(endian, Endianness.HOST_ENDIAN)) {
       set_value = _toEndianInt16(set_value, endian._littleEndian);
     }
     _typeddata._setInt16(_offset + byteOffset, set_value);
   }
 
   int getUint16(int byteOffset, [Endianness endian = Endianness.BIG_ENDIAN]) {
     if (byteOffset < 0 || byteOffset >= length) {
       _throwRangeError(byteOffset, length);
     }
     var result = _typeddata._getUint16(_offset + byteOffset);
-    if (endian === Endianness.HOST_ENDIAN) {
+    if (identical(endian, Endianness.HOST_ENDIAN)) {
       return result;
     }
     return _toEndianUint16(result, endian._littleEndian);
   }
   void setUint16(int byteOffset,
                  int value,
                  [Endianness endian = Endianness.BIG_ENDIAN]) {
     if (byteOffset < 0 || byteOffset >= length) {
       _throwRangeError(byteOffset, length);
     }
     var set_value = _toUint16(value);
-    if (endian !== Endianness.HOST_ENDIAN) {
+    if (!identical(endian, Endianness.HOST_ENDIAN)) {
       set_value = _toEndianUint16(set_value, endian._littleEndian);
     }
     _typeddata._setUint16(_offset + byteOffset, set_value);
   }
 
   int getInt32(int byteOffset, [Endianness endian = Endianness.BIG_ENDIAN]) {
     if (byteOffset < 0 || byteOffset >= length) {
       _throwRangeError(byteOffset, length);
     }
     var result = _typeddata._getInt32(_offset + byteOffset);
-    if (endian === Endianness.HOST_ENDIAN) {
+    if (identical(endian, Endianness.HOST_ENDIAN)) {
       return result;
     }
     return _toEndianInt32(result, endian._littleEndian);
   }
   void setInt32(int byteOffset,
                 int value,
                 [Endianness endian = Endianness.BIG_ENDIAN]) {
     if (byteOffset < 0 || byteOffset >= length) {
       _throwRangeError(byteOffset, length);
     }
     var set_value = _toInt32(value);
-    if (endian !== Endianness.HOST_ENDIAN) {
+    if (!identical(endian, Endianness.HOST_ENDIAN)) {
       set_value = _toEndianInt32(set_value, endian._littleEndian);
     }
     _typeddata._setInt32(_offset + byteOffset, set_value);
   }
 
   int getUint32(int byteOffset, [Endianness endian = Endianness.BIG_ENDIAN]) {
     if (byteOffset < 0 || byteOffset >= length) {
       _throwRangeError(byteOffset, length);
     }
     var result = _typeddata._getUint32(_offset + byteOffset);
-    if (endian === Endianness.HOST_ENDIAN) {
+    if (identical(endian, Endianness.HOST_ENDIAN)) {
       return result;
     }
     return _toEndianUint32(result, endian._littleEndian);
   }
   void setUint32(int byteOffset,
                  int value,
                  [Endianness endian = Endianness.BIG_ENDIAN]) {
     if (byteOffset < 0 || byteOffset >= length) {
       _throwRangeError(byteOffset, length);
     }
     var set_value = _toUint32(value);
-    if (endian !== Endianness.HOST_ENDIAN) {
+    if (!identical(endian, Endianness.HOST_ENDIAN)) {
       set_value = _toEndianUint32(set_value, endian._littleEndian);
     }
     _typeddata._setUint32(_offset + byteOffset, set_value);
   }
 
   int getInt64(int byteOffset, [Endianness endian = Endianness.BIG_ENDIAN]) {
     if (byteOffset < 0 || byteOffset >= length) {
       _throwRangeError(byteOffset, length);
     }
     var result = _typeddata._getInt64(_offset + byteOffset);
-    if (endian === Endianness.HOST_ENDIAN) {
+    if (identical(endian, Endianness.HOST_ENDIAN)) {
       return result;
     }
     return _toEndianInt64(result, endian._littleEndian);
   }
   void setInt64(int byteOffset,
                 int value,
                 [Endianness endian = Endianness.BIG_ENDIAN]) {
     if (byteOffset < 0 || byteOffset >= length) {
       _throwRangeError(byteOffset, length);
     }
     var set_value = _toInt64(value);
-    if (endian !== Endianness.HOST_ENDIAN) {
+    if (!identical(endian, Endianness.HOST_ENDIAN)) {
       set_value = _toEndianInt64(set_value, endian._littleEndian);
     }
     _typeddata._setInt64(_offset + byteOffset, set_value);
   }
 
   int getUint64(int byteOffset, [Endianness endian = Endianness.BIG_ENDIAN]) {
     if (byteOffset < 0 || byteOffset >= length) {
       _throwRangeError(byteOffset, length);
     }
     var result = _typeddata._getUint64(_offset + byteOffset);
-    if (endian === Endianness.HOST_ENDIAN) {
+    if (identical(endian, Endianness.HOST_ENDIAN)) {
       return result;
     }
     return _toEndianUint64(result, endian._littleEndian);
   }
   void setUint64(int byteOffset,
                  int value,
                  [Endianness endian = Endianness.BIG_ENDIAN]) {
     if (byteOffset < 0 || byteOffset >= length) {
       _throwRangeError(byteOffset, length);
     }
     var set_value = _toUint64(value);
-    if (endian !== Endianness.HOST_ENDIAN) {
+    if (!identical(endian, Endianness.HOST_ENDIAN)) {
       set_value = _toEndianUint64(set_value, endian._littleEndian);
     }
     _typeddata._setUint64(_offset + byteOffset, set_value);
   }
 
   double getFloat32(int byteOffset,
                     [Endianness endian = Endianness.BIG_ENDIAN]) {
     if (byteOffset < 0 || byteOffset >= length) {
       _throwRangeError(byteOffset, length);
     }
     var result = _typeddata._getFloat32(_offset + byteOffset);
-    if (endian === Endianness.HOST_ENDIAN) {
+    if (identical(endian, Endianness.HOST_ENDIAN)) {
       return result;
     }
     return _toEndianFloat32(result, endian._littleEndian);
   }
   void setFloat32(int byteOffset,
                   double value,
                   [Endianness endian = Endianness.BIG_ENDIAN]) {
     if (byteOffset < 0 || byteOffset >= length) {
       _throwRangeError(byteOffset, length);
     }
     var set_value = value;
-    if (endian !== Endianness.HOST_ENDIAN) {
+    if (!identical(endian, Endianness.HOST_ENDIAN)) {
       set_value = _toEndianFloat32(set_value, endian._littleEndian);
     }
     _typeddata._setFloat32(_offset + byteOffset, set_value);
   }
 
   double getFloat64(int byteOffset,
                     [Endianness endian = Endianness.BIG_ENDIAN]) {
     if (byteOffset < 0 || byteOffset >= length) {
       _throwRangeError(byteOffset, length);
     }
     var result = _typeddata._getFloat64(_offset + byteOffset);
-    if (endian === Endianness.HOST_ENDIAN) {
+    if (identical(endian, Endianness.HOST_ENDIAN)) {
       return result;
     }
     return _toEndianFloat64(result, endian._littleEndian);
   }
   void setFloat64(int byteOffset,
                   double value,
                   [Endianness endian = Endianness.BIG_ENDIAN]) {
     if (byteOffset < 0 || byteOffset >= length) {
       _throwRangeError(byteOffset, length);
     }
     var set_value = value;
-    if (endian !== Endianness.HOST_ENDIAN) {
+    if (!identical(endian, Endianness.HOST_ENDIAN)) {
       set_value = _toEndianFloat64(set_value, endian._littleEndian);
     }
     _typeddata._setFloat64(_offset + byteOffset, set_value);
   }
 
   Float32x4 getFloat32x4(int byteOffset,
                          [Endianness endian = Endianness.BIG_ENDIAN]) {
     if (byteOffset < 0 || byteOffset >= length) {
       _throwRangeError(byteOffset, length);
     }
@@ skipping 111 matching lines @@
     return value;
   }
   return object;
 }
 
 
 void _throwRangeError(int index, int length) {
   String message = "$index must be in the range [0..$length)";
   throw new RangeError(message);
 }