Unify most of our utf8 implementations. This takes the implementation

editor/tools/features/com.google.dart.tools.deploy.feature_releng/build_rcp.xml

 <!--
 This build script will build the Dart RCP and Dart update site.  
 
 This script will setup the PDE build structure and then call into the PDE
 build system.  The PDE build system has to run under Eclipse.
 -->
 <project name="build_dart" default="build_rcp">
     
     <import file="build-common.xml" />
 
@@ skipping 237 matching lines @@
         <copyDartLib name="core" dir="${build.tmp}/lib/core-dartc" libfile="corelib.dart"/>
         <copyDartLib name="coreimpl" dir="${build.tmp}/lib/core-dartc" libfile="corelib_impl.dart"/>
         
         <!-- dart:dom -->
         <copyDartLib name="dom" dir="${build.source.root}/client/dom"/>
         
         <!-- dart:html -->
         <copyDartLib name="html" dir="${build.source.root}/client/html"/>
         <copyDartLib name="htmlimpl" dir="${build.source.root}/client/html"/>
 
-        <!-- dart:json, dart:uri, dart:utf8 -->
+        <!-- dart:json, dart:uri, dart:utf -->
         <copy todir="${libraries.out.dir}">
             <fileset dir="${build.source.root}/lib" includes="**/*.dart"/>
         </copy>
 
         <!-- dart:builtin -->
         <copy todir="${libraries.out.dir}/builtin">
             <fileset dir="${build.source.root}/runtime/bin" includes="builtin.dart"/>
         </copy>
         
         <!-- dart:nativewrappers -->
@@ skipping 336 matching lines @@
         </copy>
     </target>
 
     <!-- - - - - - - - - - - - - - - - - - 
           target: doDeploy_rcp                      
          - - - - - - - - - - - - - - - - - -->
     <target name="doDeploy_rcp" depends="init, setupBuild, doBuild_rcp, package_rcp">
     </target>
 
 </project>