Remove old dart2js code.

sdk/lib/_internal/compiler/implementation/tracer.dart

Index: sdk/lib/_internal/compiler/implementation/tracer.dart
diff --git a/sdk/lib/_internal/compiler/implementation/tracer.dart b/sdk/lib/_internal/compiler/implementation/tracer.dart
deleted file mode 100644
index cbdbf60555a01a62a9b4b4fb44f08fb1cb7888ce..0000000000000000000000000000000000000000
--- a/sdk/lib/_internal/compiler/implementation/tracer.dart
+++ /dev/null
@@ -1,119 +0,0 @@
-// Copyright (c) 2014, 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.
-
-library tracer;
-
-import '../compiler.dart' as api;
-import 'dart:async' show EventSink;
-import 'ssa/ssa.dart' as ssa;
-import 'ssa/ssa_tracer.dart' show HTracer;
-import 'cps_ir/cps_ir_nodes.dart' as cps_ir;
-import 'cps_ir/cps_ir_tracer.dart' show IRTracer;
-import 'dart_backend/tree_ir_nodes.dart' as tree_ir;
-import 'dart_backend/tree_ir_tracer.dart' show TreeTracer;
-import 'util/util.dart' show Indentation;
-import 'dart2jslib.dart';
-
-/**
- * If non-null, we only trace methods whose name match the regexp defined by the
- * given pattern.
- */
-const String TRACE_FILTER_PATTERN = const String.fromEnvironment("DUMP_IR");
-
-final RegExp TRACE_FILTER =
-    TRACE_FILTER_PATTERN == null ? null : new RegExp(TRACE_FILTER_PATTERN);
-
-/**
- * Dumps the intermediate representation after each phase in a format
- * readable by IR Hydra.
- */
-class Tracer extends TracerUtil {
-  final Compiler compiler;
-  ItemCompilationContext context;
-  bool traceActive = false;
-  final EventSink<String> output;
-  final bool isEnabled = TRACE_FILTER != null;
-
-  Tracer(Compiler compiler, api.CompilerOutputProvider outputProvider)
-      : this.compiler = compiler,
-        output = TRACE_FILTER != null ? outputProvider('dart', 'cfg') : null;
-
-  void traceCompilation(String methodName,
-                        ItemCompilationContext compilationContext) {
-    if (!isEnabled) return;
-    traceActive = TRACE_FILTER.hasMatch(methodName);
-    if (!traceActive) return;
-    this.context = compilationContext;
-    tag("compilation", () {
-      printProperty("name", methodName);
-      printProperty("method", methodName);
-      printProperty("date", new DateTime.now().millisecondsSinceEpoch);
-    });
-  }
-
-  void traceGraph(String name, var irObject) {
-    if (!traceActive) return;
-    if (irObject is ssa.HGraph) {
-      new HTracer(output, compiler, context).traceGraph(name, irObject);
-    }
-    else if (irObject is cps_ir.FunctionDefinition) {
-      new IRTracer(output).traceGraph(name, irObject);
-    }
-    else if (irObject is tree_ir.FunctionDefinition) {
-      new TreeTracer(output).traceGraph(name, irObject);
-    }
-  }
-
-  void close() {
-    if (output != null) {
-      output.close();
-    }
-  }
-}
-
-
-abstract class TracerUtil {
-  EventSink<String> get output;
-  final Indentation _ind = new Indentation();
-
-  void tag(String tagName, Function f) {
-    println("begin_$tagName");
-    _ind.indentBlock(f);
-    println("end_$tagName");
-  }
-
-  void println(String string) {
-    addIndent();
-    add(string);
-    add("\n");
-  }
-
-  void printEmptyProperty(String propertyName) {
-    println(propertyName);
-  }
-
-  String formatPrty(x) {
-    if (x is num) {
-      return '${x}';
-    } else if (x is String) {
-      return '"${x}"';
-    } else if (x is Iterable) {
-      return x.map((s) => formatPrty(s)).join(' ');
-    } else {
-      throw "invalid property type: ${x}";
-    }
-  }
-
-  void printProperty(String propertyName, value) {
-    println("$propertyName ${formatPrty(value)}");
-  }
-
-  void add(String string) {
-    output.add(string);
-  }
-
-  void addIndent() {
-    add(_ind.indentation);
-  }
-}