Remove backends.

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

Index: compiler/java/com/google/dart/compiler/backend/js/JsRequiresSemiVisitor.java
diff --git a/compiler/java/com/google/dart/compiler/backend/js/JsRequiresSemiVisitor.java b/compiler/java/com/google/dart/compiler/backend/js/JsRequiresSemiVisitor.java
deleted file mode 100644
index b099959ad1a185316ddeb8a0a8ace06eedbcce9b..0000000000000000000000000000000000000000
--- a/compiler/java/com/google/dart/compiler/backend/js/JsRequiresSemiVisitor.java
+++ /dev/null
@@ -1,158 +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.JsBlock;
-import com.google.dart.compiler.backend.js.ast.JsBreak;
-import com.google.dart.compiler.backend.js.ast.JsContext;
-import com.google.dart.compiler.backend.js.ast.JsDebugger;
-import com.google.dart.compiler.backend.js.ast.JsDoWhile;
-import com.google.dart.compiler.backend.js.ast.JsEmpty;
-import com.google.dart.compiler.backend.js.ast.JsExprStmt;
-import com.google.dart.compiler.backend.js.ast.JsFor;
-import com.google.dart.compiler.backend.js.ast.JsForIn;
-import com.google.dart.compiler.backend.js.ast.JsIf;
-import com.google.dart.compiler.backend.js.ast.JsLabel;
-import com.google.dart.compiler.backend.js.ast.JsReturn;
-import com.google.dart.compiler.backend.js.ast.JsStatement;
-import com.google.dart.compiler.backend.js.ast.JsSwitch;
-import com.google.dart.compiler.backend.js.ast.JsThrow;
-import com.google.dart.compiler.backend.js.ast.JsTry;
-import com.google.dart.compiler.backend.js.ast.JsVars;
-import com.google.dart.compiler.backend.js.ast.JsVisitor;
-import com.google.dart.compiler.backend.js.ast.JsWhile;
-
-/**
- * Determines if a statement at the end of a block requires a semicolon.
- * 
- * For example, the following statements require semicolons:<br>
- * <ul>
- * <li>if (cond);</li>
- * <li>while (cond);</li>
- * </ul>
- * 
- * The following do not require semicolons:<br>
- * <ul>
- * <li>return 1</li>
- * <li>do {} while(true)</li>
- * </ul>
- */
-public class JsRequiresSemiVisitor extends JsVisitor {
-
-  public static boolean exec(JsStatement lastStatement) {
-    JsRequiresSemiVisitor visitor = new JsRequiresSemiVisitor();
-    visitor.accept(lastStatement);
-    return visitor.needsSemicolon;
-  }
-
-  private boolean needsSemicolon = false;
-
-  private JsRequiresSemiVisitor() {
-  }
-
-  @Override
-  public boolean visit(JsBlock x, JsContext ctx) {
-    return false;
-  }
-
-  @Override
-  public boolean visit(JsBreak x, JsContext ctx) {
-    return false;
-  }
-
-  @Override
-  public boolean visit(JsDebugger x, JsContext ctx) {
-    return false;
-  }
-
-  @Override
-  public boolean visit(JsDoWhile x, JsContext ctx) {
-    return false;
-  }
-
-  @Override
-  public boolean visit(JsEmpty x, JsContext ctx) {
-    return false;
-  }
-
-  @Override
-  public boolean visit(JsExprStmt x, JsContext ctx) {
-    return false;
-  }
-
-  @Override
-  public boolean visit(JsFor x, JsContext ctx) {
-    if (x.getBody() instanceof JsEmpty) {
-      needsSemicolon = true;
-    }
-    return false;
-  }
-
-  @Override
-  public boolean visit(JsForIn x, JsContext ctx) {
-    if (x.getBody() instanceof JsEmpty) {
-      needsSemicolon = true;
-    }
-    return false;
-  }
-
-  @Override
-  public boolean visit(JsIf x, JsContext ctx) {
-    JsStatement thenStmt = x.getThenStmt();
-    JsStatement elseStmt = x.getElseStmt();
-    JsStatement toCheck = thenStmt;
-    if (elseStmt != null) {
-      toCheck = elseStmt;
-    }
-    if (toCheck instanceof JsEmpty) {
-      needsSemicolon = true;
-    } else {
-      // Must recurse to determine last statement (possible if-else chain).
-      accept(toCheck);
-    }
-    return false;
-  }
-
-  @Override
-  public boolean visit(JsLabel x, JsContext ctx) {
-    if (x.getStmt() instanceof JsEmpty) {
-      needsSemicolon = true;
-    }
-    return false;
-  }
-
-  @Override
-  public boolean visit(JsReturn x, JsContext ctx) {
-    return false;
-  }
-
-  @Override
-  public boolean visit(JsSwitch x, JsContext ctx) {
-    return false;
-  }
-
-  @Override
-  public boolean visit(JsThrow x, JsContext ctx) {
-    return false;
-  }
-
-  @Override
-  public boolean visit(JsTry x, JsContext ctx) {
-    return false;
-  }
-
-  @Override
-  public boolean visit(JsVars x, JsContext ctx) {
-    return false;
-  }
-
-  @Override
-  public boolean visit(JsWhile x, JsContext ctx) {
-    if (x.getBody() instanceof JsEmpty) {
-      needsSemicolon = true;
-    }
-    return false;
-  }
-}