Rename two classes

editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/internal/sdk/SdkLibrariesReader.java

Index: editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/internal/sdk/SdkLibrariesReader.java
===================================================================
--- editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/internal/sdk/SdkLibrariesReader.java	(revision 16603)
+++ editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/internal/sdk/SdkLibrariesReader.java	(working copy)
@@ -27,7 +27,7 @@
 import com.google.dart.engine.parser.Parser;
 import com.google.dart.engine.scanner.StringScanner;
 import com.google.dart.engine.source.Source;
-import com.google.dart.engine.source.SourceImpl;
+import com.google.dart.engine.source.FileBasedSource;
 
 import java.util.List;
 
@@ -160,7 +160,7 @@
         foundError[0] = true;
       }
     };
-    Source source = new SourceImpl(null, null, false);
+    Source source = new FileBasedSource(null, null, false);
     StringScanner scanner = new StringScanner(source, libraryFileContents, errorListener);
     Parser parser = new Parser(source, errorListener);
     CompilationUnit unit = parser.parseCompilationUnit(scanner.tokenize());