Remove backends.

compiler/java/com/google/dart/compiler/backend/js/ast/JsNameRef.java

Index: compiler/java/com/google/dart/compiler/backend/js/ast/JsNameRef.java
diff --git a/compiler/java/com/google/dart/compiler/backend/js/ast/JsNameRef.java b/compiler/java/com/google/dart/compiler/backend/js/ast/JsNameRef.java
deleted file mode 100644
index fd07125e98b80ed7059b870fa6302afb790663e0..0000000000000000000000000000000000000000
--- a/compiler/java/com/google/dart/compiler/backend/js/ast/JsNameRef.java
+++ /dev/null
@@ -1,120 +0,0 @@
-// Copyright (c) 2011, 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.
-
-package com.google.dart.compiler.backend.js.ast;
-
-import com.google.dart.compiler.common.Symbol;
-
-/**
- * Represents a JavaScript expression that references a name.
- */
-public final class JsNameRef extends JsExpression implements CanBooleanEval, HasName {
-
-  private String ident;
-  private JsName name;
-  private JsExpression qualifier;
-
-  public JsNameRef(JsName name) {
-    this.name = name;
-  }
-
-  public JsNameRef(String ident) {
-    this.ident = ident;
-  }
-
-  public String getIdent() {
-    return (name == null) ? ident : name.getIdent();
-  }
-
-  @Override
-  public JsName getName() {
-    return name;
-  }
-
-  @Override
-  public Symbol getSymbol() {
-    return name;
-  }
-
-  public JsExpression getQualifier() {
-    return qualifier;
-  }
-
-  public String getShortIdent() {
-    return (name == null) ? ident : name.getShortIdent();
-  }
-
-  @Override
-  public boolean hasSideEffects() {
-    if (qualifier == null) {
-      return false;
-    }
-    if (!qualifier.isDefinitelyNotNull()) {
-      // Could trigger NPE.
-      return true;
-    }
-    return qualifier.hasSideEffects();
-  }
-
-  @Override
-  public boolean isBooleanFalse() {
-    return isDefinitelyNull();
-  }
-
-  @Override
-  public boolean isBooleanTrue() {
-    return false;
-  }
-
-  @Override
-  public boolean isDefinitelyNotNull() {
-    // TODO: look for single-assignment of stuff from Java?
-    return false;
-  }
-
-  @Override
-  public boolean isDefinitelyNull() {
-    if (name != null) {
-      return (name.getEnclosing().getProgram().getUndefinedLiteral().getName() == name);
-    }
-    return false;
-  }
-
-  @Override
-  public boolean isLeaf() {
-    if (qualifier == null) {
-      return true;
-    } else {
-      return false;
-    }
-  }
-
-  public boolean isResolved() {
-    return name != null;
-  }
-
-  public void resolve(JsName name) {
-    this.name = name;
-    this.ident = null;
-  }
-
-  public void setQualifier(JsExpression qualifier) {
-    this.qualifier = qualifier;
-  }
-
-  @Override
-  public void traverse(JsVisitor v, JsContext ctx) {
-    if (v.visit(this, ctx)) {
-      if (qualifier != null) {
-        qualifier = v.accept(qualifier);
-      }
-    }
-    v.endVisit(this, ctx);
-  }
-
-  @Override
-  public NodeKind getKind() {
-    return NodeKind.NAME_REF;
-  }
-}