Implement canonical name scheme in kernel.

pkg/kernel/lib/binary/tag.dart

Index: pkg/kernel/lib/binary/tag.dart
diff --git a/pkg/kernel/lib/binary/tag.dart b/pkg/kernel/lib/binary/tag.dart
index 226b190427eae836ac41a9bb04f76881daeeb937..16625bcf37a471e24b1f822eb42ac9b97063ed4b 100644
--- a/pkg/kernel/lib/binary/tag.dart
+++ b/pkg/kernel/lib/binary/tag.dart
@@ -7,8 +7,7 @@ class Tag {
   static const int Nothing = 0;
   static const int Something = 1;
 
-  static const int NormalClass = 2;
-  static const int MixinClass = 3;
+  static const int Class = 2;
 
   static const int Field = 4;
   static const int Constructor = 5;
@@ -98,14 +97,8 @@ class Tag {
   static const int SimpleFunctionType = 97;
 
   static const int NullReference = 99;
-  static const int NormalClassReference = 100;
-  static const int MixinClassReference = 101;
-
-  static const int LibraryFieldReference = 102;
-  static const int ClassFieldReference = 103;
-  static const int ClassConstructorReference = 104;
-  static const int LibraryProcedureReference = 105;
-  static const int ClassProcedureReference = 106;
+  static const int ClassReference = 100;
+  static const int MemberReference = 101;
 
   static const int SpecializedTagHighBit = 0x80; // 10000000
   static const int SpecializedTagMask = 0xF8; // 11111000