Remove backends.

compiler/java/com/google/dart/compiler/CompilerConfiguration.java

-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
+// Copyright (c) 2012, 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;
 
 import com.google.dart.compiler.CommandLineOptions.CompilerOptions;
 import com.google.dart.compiler.metrics.CompilerMetrics;
 
 import java.io.File;
 import java.util.List;
 
 /**
- * A configuration for the Dart compiler specifying which phases
- * and backends will be executed.
+ * A configuration for the Dart compiler specifying which phases will be executed.
  */
 public interface CompilerConfiguration {
 
   enum ErrorFormat {
     NORMAL,  // Library/File, line, message
     MACHINE, // All information including severity, subsystem, etc
   }
 
   List<DartCompilationPhase> getPhases();
 
-  List<Backend> getBackends();
-
-  /**
-   * Indicates whether developer-mode runtime checks are needed. 
-   * @return true if developer-mode checks should be inserted, false if not
-   */
-  boolean developerModeChecks();
-
   /**
    * Returns the {@link CompilerMetrics} instance or <code>null</code> if metrics should not be
    * recorded.
    *
    * @return the metrics instance, <code>null</code> if metrics should not be recorded
    */
   CompilerMetrics getCompilerMetrics();
 
   /**
    * Returns a comma-separated string list of options for displaying jvm metrics.
@@ skipping 11 matching lines @@
    */
   boolean resolveDespiteParseErrors();
 
   /**
    * Temporary flag to turn on incremental compilation. This will be removed once we're certain
    * incremental compilation is correct.
    */
   boolean incremental();
 
   /**
-   * The first backend that runs outputs to this filename if set.
-   */
-  File getOutputFilename();
-
-  /**
    * The work directory where incremental build output is stored between invocations.
    */
   File getOutputDirectory();
 
   /**
-   * Returns <code>true</code> if the compiler should not produce output.
-   */
-  boolean checkOnly();
-
-  /**
-   * Returns <code>true</code> if the compiler should expect an entry point to be defined.
-   */
-  boolean expectEntryPoint();
-
-  /**
    * Returns the error formatting the compiler should print with
    */
   ErrorFormat printErrorFormat();
 
   /**
    * Return the system library corresponding to the specified "dart:<libname>" spec.
    */
   LibrarySource getSystemLibraryFor(String importSpec);
 
   /**
    * Return {@link CompilerOptions} instance.
    * @return command line options passed to the compiler.
    */
   CompilerOptions getCompilerOptions();
 }