Remove BackendClasses and JavaScriptBackendClasses.

pkg/compiler/lib/src/common/backend_api.dart

Index: pkg/compiler/lib/src/common/backend_api.dart
diff --git a/pkg/compiler/lib/src/common/backend_api.dart b/pkg/compiler/lib/src/common/backend_api.dart
index bdad5c4806dada5982d16965be2f801a102a9f8f..9a08319d216425250282c4e2ae2de7620db9e786 100644
--- a/pkg/compiler/lib/src/common/backend_api.dart
+++ b/pkg/compiler/lib/src/common/backend_api.dart
@@ -55,132 +55,3 @@ class BackendSerialization {
   SerializerPlugin get serializer => const SerializerPlugin();
   DeserializerPlugin get deserializer => const DeserializerPlugin();
 }
-
-/// Interface providing access to core classes used by the backend.
-abstract class BackendClasses {
-  /// Returns the backend implementation class for `int`. This is the `JSInt`
-  /// class.
-  ClassEntity get intClass;
-
-  /// Returns the backend implementation class for `double`. This is the
-  /// `JSDouble` class.
-  ClassEntity get doubleClass;
-
-  /// Returns the backend implementation class for `num`. This is the `JSNum`
-  /// class.
-  ClassEntity get numClass;
-
-  /// Returns the backend implementation class for `String`. This is the
-  /// `JSString` class.
-  ClassEntity get stringClass;
-
-  /// Returns the backend implementation class for `List`. This is the
-  /// `JSArray` class.
-  ClassEntity get listClass;
-
-  /// Returns the backend dummy class used to track mutable implementations of
-  /// `List` in type masks. This is the `JSMutableArray` class.
-  ClassEntity get mutableListClass;
-
-  /// Returns the backend dummy class used to track growable implementations of
-  /// `List` in type masks. This is the `JSExtendableArray` class.
-  ClassEntity get growableListClass;
-
-  /// Returns the backend dummy class used to track fixed-sized implementations
-  /// of `List` in type masks. This is the `JSFixedArray` class.
-  ClassEntity get fixedListClass;
-
-  /// Returns the backend dummy class used to track unmodifiable (constant)
-  /// implementations of `List` in type masks. This is the `JSUnmodifiableArray`
-  /// class.
-  ClassEntity get constListClass;
-
-  /// Returns the backend implementation class for map literals. This is the
-  /// `LinkedHashMap` class.
-  ClassEntity get mapClass;
-
-  /// Returns the backend superclass for implementations of constant map
-  /// literals. This is the `ConstantMap` class.
-  ClassEntity get constMapClass;
-
-  /// Returns the backend implementation class for `Function`. This is the
-  /// `Function` class from 'dart:core'.
-  ClassEntity get functionClass;
-
-  /// Returns the backend implementation class for `Type`. This is the
-  /// `TypeImpl` class.
-  ClassEntity get typeClass;
-
-  /// Returns the type of the implementation class for `Type`.
-  InterfaceType get typeType;
-
-  /// Returns the backend implementation class for `bool`. This is the `JSBool`
-  /// class.
-  ClassEntity get boolClass;
-
-  /// Returns the backend implementation class for `null`. This is the `JSNull`
-  /// class.
-  ClassEntity get nullClass;
-
-  /// Returns the backend dummy class used to track unsigned 32-bit integer
-  /// values in type masks. This is the `JSUint32` class.
-  ClassEntity get uint32Class;
-
-  /// Returns the backend dummy class used to track unsigned 31-bit integer
-  /// values in type masks. This is the `JSUint31` class.
-  ClassEntity get uint31Class;
-
-  /// Returns the backend dummy class used to track position values in type
-  /// masks. This is the `JSPositiveInt` class.
-  ClassEntity get positiveIntClass;
-
-  /// Returns the backend implementation class for the `Iterable` used in
-  /// `sync*` methods. This is the `_SyncStarIterable` class in dart:async.
-  ClassEntity get syncStarIterableClass;
-
-  /// Returns the backend implementation class for the `Future` used in
-  /// `async` methods. This is the `_Future` class in dart:async.
-  ClassEntity get asyncFutureClass;
-
-  /// Returns the backend implementation class for the `Stream` used in
-  /// `async*` methods. This is the `_ControllerStream` class in dart:async.
-  ClassEntity get asyncStarStreamClass;
-
-  /// Returns the backend superclass directly indexable class, that is classes
-  /// that natively support the `[]` operator. This is the `JSIndexable` class.
-  ClassEntity get indexableClass;
-
-  /// Returns the backend superclass directly indexable class, that is classes
-  /// that natively support the `[]=` operator. This is the `JSMutableIndexable`
-  /// class.
-  ClassEntity get mutableIndexableClass;
-
-  /// Returns the backend class used to mark native classes that support integer
-  /// indexing, that is `[]` and `[]=` where the key is an integer. This is the
-  /// `JavaScriptIndexingBehavior` class.
-  ClassEntity get indexingBehaviorClass;
-
-  /// Returns the backend superclass for all intercepted classes. This is the
-  /// `Interceptor` class.
-  ClassEntity get interceptorClass;
-
-  /// Returns `true` if [element] is a default implementation of `Object.==`.
-  /// This either `Object.==`, `Intercepter.==` or `Null.==`.
-  bool isDefaultEqualityImplementation(MemberEntity element);
-
-  /// Returns `true` if [cls] is a native class.
-  bool isNativeClass(ClassEntity element);
-
-  /// Returns the type of the constant map implementation for a const map
-  /// literal of [sourceType]. If [hasProtoKey] the map contains key of value
-  /// '__proto__' and if [onlyStringKeys] all keys are string constants.
-  InterfaceType getConstantMapTypeFor(InterfaceType sourceType,
-      {bool hasProtoKey: false, bool onlyStringKeys: false});
-
-  /// Returns the type of the constant symbol implementation class.
-  InterfaceType get symbolType;
-
-  /// Returns the field of the constant symbol implementation class that holds
-  /// its internal name.
-  FieldEntity get symbolField;
-}