Remove backends.

editor/tools/plugins/com.google.dart.tools.core/src/com/google/dart/tools/core/DartCore.java

Index: editor/tools/plugins/com.google.dart.tools.core/src/com/google/dart/tools/core/DartCore.java
diff --git a/editor/tools/plugins/com.google.dart.tools.core/src/com/google/dart/tools/core/DartCore.java b/editor/tools/plugins/com.google.dart.tools.core/src/com/google/dart/tools/core/DartCore.java
index 8dc73a50151a408af34b6f1bdc73e767b005ce17..be5d7767e1620d4a79ba2cdeebb5350eea9e7e6d 100644
--- a/editor/tools/plugins/com.google.dart.tools.core/src/com/google/dart/tools/core/DartCore.java
+++ b/editor/tools/plugins/com.google.dart.tools.core/src/com/google/dart/tools/core/DartCore.java
@@ -104,6 +104,16 @@ public class DartCore extends Plugin {
   public static final String DART_PROBLEM_MARKER_TYPE = PLUGIN_ID + ".problem";
 
   /**
+   * Extension for single unit compiled into JavaScript.
+   */
+  public static final String EXTENSION_JS = "js";

[Brian Wilkerson, 2012/02/27 20:47:03]

I believe that these two constants should eventually be removed. If so, please
mark them as @Deprecated and let me know whether you plan to clean them up or
want someone else to. Otherwise, please explain why we still need them.

[scheglov, 2012/02/29 22:46:41]

I've added @Deprecated for EXTENSION_JS.

EXTENSION_APP_JS is not used and was removed.

+
+  /**
+   * Extension for application compiled into JavaScript.
+   */
+  public static final String EXTENSION_APP_JS = "app.js";
+
+  /**
    * Cached extensions for CSS files.
    */
   private static final String[] CSS_FILE_EXTENSIONS = {"css"};