Remove backends.

compiler/java/com/google/dart/compiler/backend/js/JsPrettyNamer.java

Index: compiler/java/com/google/dart/compiler/backend/js/JsPrettyNamer.java
diff --git a/compiler/java/com/google/dart/compiler/backend/js/JsPrettyNamer.java b/compiler/java/com/google/dart/compiler/backend/js/JsPrettyNamer.java
deleted file mode 100644
index 4d18fdbf1beb9a54dd32287077308adf0786278b..0000000000000000000000000000000000000000
--- a/compiler/java/com/google/dart/compiler/backend/js/JsPrettyNamer.java
+++ /dev/null
@@ -1,127 +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;
-
-import com.google.dart.compiler.backend.js.ast.JsName;
-import com.google.dart.compiler.backend.js.ast.JsProgram;
-import com.google.dart.compiler.backend.js.ast.JsRootScope;
-import com.google.dart.compiler.backend.js.ast.JsScope;
-
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.IdentityHashMap;
-import java.util.Iterator;
-import java.util.List;
-import java.util.Set;
-
-/**
- * A namer that uses short, readable idents to maximize reability.
- */
-public class JsPrettyNamer implements JsNamer {
-
-  public JsPrettyNamer() {
-    this.program = null;
-  }
-
-  @Override
-  public void exec(JsProgram program) {
-    new JsPrettyNamer(program).execImpl();
-  }
-
-  /**
-   * Communicates to a parent scope all the idents used by all child scopes.
-   */
-  private Set<String> childIdents = null;
-
-  private final JsProgram program;
-
-  /**
-   * A map containing the next integer to try as an identifier suffix for a
-   * given JsScope.
-   */
-  private IdentityHashMap<JsScope, HashMap<String, Integer>> startIdentForScope =
-      new IdentityHashMap<JsScope, HashMap<String, Integer>>();
-
-  protected JsPrettyNamer(JsProgram program) {
-    this.program = program;
-  }
-
-  private void execImpl() {
-    visit(program.getRootScope());
-  }
-
-  private boolean isLegal(JsScope scope, Set<String> childIdents, String newIdent) {
-    if (JsReservedIdentifiers.isKeyword(newIdent)) {
-      return false;
-    }
-    if (childIdents.contains(newIdent)) {
-      // one of my children already claimed this ident
-      return false;
-    }
-    /*
-     * Never obfuscate a name into an identifier that conflicts with an existing
-     * unobfuscatable name! It's okay if it conflicts with an existing
-     * obfuscatable name; that name will get obfuscated out of the way.
-     */
-    return (scope.findExistingUnobfuscatableName(newIdent) == null);
-  }
-
-  private void visit(JsScope scope) {
-    HashMap<String, Integer> startIdent = startIdentForScope.get(scope);
-    if (startIdent == null) {
-      startIdent = new HashMap<String, Integer>();
-      startIdentForScope.put(scope, startIdent);
-    }
-
-    // Save off the childIdents which is currently being computed for my parent.
-    Set<String> myChildIdents = childIdents;
-
-    /*
-     * Visit my children first. Reset childIdents so that my children will get a
-     * clean slate: I do not communicate to my children.
-     */
-    childIdents = new HashSet<String>();
-    List<JsScope> children = scope.getChildren();
-    for (Iterator<JsScope> it = children.iterator(); it.hasNext();) {
-      visit(it.next());
-    }
-
-    JsRootScope rootScope = program.getRootScope();
-    if (scope == rootScope) {
-      return;
-    }
-
-    // Visit all my idents.
-    for (Iterator<JsName> it = scope.getAllNames(); it.hasNext();) {
-      JsName name = it.next();
-      if (!name.isObfuscatable()) {
-        // Unobfuscatable names become themselves.
-        name.setShortIdent(name.getIdent());
-        continue;
-      }
-
-      String newIdent = name.getShortIdent();
-      if (!isLegal(scope, childIdents, newIdent)) {
-        String checkIdent;
-
-        // Start searching using a suffix hint stored in the scope.
-        // We still do a search in case there is a collision with
-        // a user-provided identifier
-        Integer s = startIdent.get(newIdent);
-        int suffix = (s == null) ? 0 : s.intValue();
-        do {
-          checkIdent = newIdent + "_" + suffix++;
-        } while (!isLegal(scope, childIdents, checkIdent));
-        startIdent.put(newIdent, suffix);
-        name.setShortIdent(checkIdent);
-      } else {
-        // nothing to do; the short name is already good
-      }
-      childIdents.add(name.getShortIdent());
-    }
-    myChildIdents.addAll(childIdents);
-    childIdents = myChildIdents;
-  }
-}