load sdk libraries defined in libraries.dart

compiler/java/com/google/dart/compiler/PackageLibraryManager.java

Index: compiler/java/com/google/dart/compiler/PackageLibraryManager.java
===================================================================
--- compiler/java/com/google/dart/compiler/PackageLibraryManager.java	(revision 11825)
+++ compiler/java/com/google/dart/compiler/PackageLibraryManager.java	(working copy)
@@ -87,7 +87,7 @@
 
   public PackageLibraryManager(File sdkPath, String platformName) {
     if (SDK_LIBRARY_MANAGER == null){
-      SDK_LIBRARY_MANAGER = new SystemLibraryManager(sdkPath, platformName);
+      SDK_LIBRARY_MANAGER = new SystemLibraryManager(sdkPath);
     }
     setPackageRoots(DEFAULT_PACKAGE_ROOTS);
   }
@@ -162,9 +162,6 @@
 
   /**
    * Given a package URI (package:foo/foo.dart), convert it into a file system URI.
-   * 
-   * @param relPath
-   * @return
    */
   public URI resolvePackageUri(String packageUriRef) {
     if (packageUriRef.startsWith(PACKAGE_SCHEME_SPEC)) {