Migrate --expose_core_impl flag from DartRunner to DartCompiler.

compiler/java/com/google/dart/runner/DartRunner.java

 // 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.runner;
 
 import com.google.common.base.Joiner;
 import com.google.common.collect.Lists;
 import com.google.common.io.CharStreams;
 import com.google.common.io.Files;
 import com.google.dart.compiler.Backend;
 import com.google.dart.compiler.CommandLineOptions;
 import com.google.dart.compiler.CommandLineOptions.DartRunnerOptions;
 import com.google.dart.compiler.CompilerConfiguration;
 import com.google.dart.compiler.DartArtifactProvider;
 import com.google.dart.compiler.DartCompilationError;
 import com.google.dart.compiler.DartCompiler;
 import com.google.dart.compiler.DartCompilerListener;
-import com.google.dart.compiler.DartSource;
 import com.google.dart.compiler.DefaultCompilerConfiguration;
 import com.google.dart.compiler.DefaultDartCompilerListener;
 import com.google.dart.compiler.DefaultErrorFormatter;
 import com.google.dart.compiler.LibrarySource;
 import com.google.dart.compiler.Source;
 import com.google.dart.compiler.UnitTestBatchRunner;
 import com.google.dart.compiler.UnitTestBatchRunner.Invocation;
 import com.google.dart.compiler.UrlLibrarySource;
 import com.google.dart.compiler.backend.js.ClosureJsBackend;
 import com.google.dart.compiler.backend.js.JavascriptBackend;
@@ skipping 88 matching lines @@
     List<LibrarySource> imports = Lists.newArrayList();
     if (options.getSourceFiles().isEmpty()) {
       throw new RunnerError("No script files specified on the command line: " + Joiner.on(" ").join(args));
     }
 
     String script = options.getSourceFiles().get(0);
     ArrayList<String> scriptArguments = new ArrayList<String>();
 
     LibrarySource app = new UrlLibrarySource(new File(script));
 
-    if (options.shouldExposeCoreImpl()) {
-      imports = new ArrayList<LibrarySource>(imports);
-      // use a place-holder LibrarySource instance, to be replaced when embedded
-      // in the compiler, where the dart uri can be resolved.
-      imports.add(new NamedPlaceHolderLibrarySource("dart:coreimpl"));
-    }
-
     File outFile =  options.getOutputFilename();
 
     DefaultDartCompilerListener listener = new DefaultDartCompilerListener() {
         {
           ((DefaultErrorFormatter) formatter).setOutputStream(stderr);
         }
         @Override
         public void compilationWarning(DartCompilationError event) {
           compilationError(event);
         }
@@ skipping 50 matching lines @@
     usage.append("\n");
 
     OutputStream s = new ByteArrayOutputStream();
     if (cmdLineParser == null) {
       cmdLineParser = new CmdLineParser(new DartRunnerOptions());
     }
     usage.append(s);
     throw new RunnerError(usage.toString());
   }
 
-  private static class NamedPlaceHolderLibrarySource implements LibrarySource {
-    private final String name;
-
-    public NamedPlaceHolderLibrarySource(String name) {
-      this.name = name;
-    }
-
-    @Override
-    public boolean exists() {
-      throw new AssertionError();
-    }
-
-    @Override
-    public long getLastModified() {
-      throw new AssertionError();
-    }
-
-    @Override
-    public String getName() {
-      return name;
-    }
-
-    @Override
-    public Reader getSourceReader() {
-      throw new AssertionError();
-    }
-
-    @Override
-    public URI getUri() {
-      throw new AssertionError();
-    }
-
-    @Override
-    public LibrarySource getImportFor(String relPath) {
-      throw new AssertionError();
-    }
-
-    @Override
-    public DartSource getSourceFor(String relPath) {
-      throw new AssertionError();
-    }
-  }
-
   private static class RunnerDartArtifactProvider extends DartArtifactProvider {
     private final Map<String, StringWriter> artifacts = new ConcurrentHashMap<String, StringWriter>();
 
     @Override
     public Reader getArtifactReader(Source source, String part, String ext) {
       String key = getKey(source, part, ext);
       StringWriter w = artifacts.get(key);
       if (w == null) {
         return null;
       }
@@ skipping 143 matching lines @@
       Reader r = provider.getArtifactReader(app, "", backend.getAppExtension());
       String js = CharStreams.toString(r);
       r.close();
       return new CompilationResult(js, mapping);
     } catch (IOException e) {
       // This can't happen; it's just a StringWriter.
       throw new AssertionError(e);
     }
   }
 }