Move JSSyntaxRegExp to core as a private member. This removes the last refrences to dart:coreimpl.

compiler/javatests/com/google/dart/compiler/PackageLibraryManagerTest.java

Index: compiler/javatests/com/google/dart/compiler/PackageLibraryManagerTest.java
diff --git a/compiler/javatests/com/google/dart/compiler/PackageLibraryManagerTest.java b/compiler/javatests/com/google/dart/compiler/PackageLibraryManagerTest.java
index bbd43c1a75de302bcb67644913b514c73eb7dc79..f455ee5d4800347a0eb1f99258753905848574c3 100644
--- a/compiler/javatests/com/google/dart/compiler/PackageLibraryManagerTest.java
+++ b/compiler/javatests/com/google/dart/compiler/PackageLibraryManagerTest.java
@@ -34,25 +34,6 @@ public class PackageLibraryManagerTest extends TestCase {
   }
 
   public void testExpand2() throws Exception {
-    URI shortUri = new URI("dart:coreimpl");
-    URI fullUri = packageLibraryManager.expandRelativeDartUri(shortUri);
-    assertNotNull(fullUri);
-    assertEquals("dart", fullUri.getScheme());
-    assertEquals("coreimpl", fullUri.getHost());
-    assertTrue(getPath(fullUri).endsWith("/coreimpl.dart"));
-  }
-
-  public void testExpand3() throws Exception {
-    URI shortUri = new URI("dart:coreimpl");
-    URI fullUri1 = packageLibraryManager.expandRelativeDartUri(shortUri);
-    URI fullUri2 = packageLibraryManager.expandRelativeDartUri(fullUri1);
-    assertNotNull(fullUri2);
-    assertEquals("dart", fullUri2.getScheme());
-    assertEquals("coreimpl", fullUri2.getHost());
-    assertTrue(getPath(fullUri2).endsWith("/coreimpl.dart"));
-  }
-
-  public void testExpand4() throws Exception {
     URI shortUri = new URI("dart:doesnotexist");
     URI fullUri = packageLibraryManager.expandRelativeDartUri(shortUri);
     assertNull(fullUri);
@@ -69,16 +50,6 @@ public class PackageLibraryManagerTest extends TestCase {
   }
 
   public void testTranslate2() throws Exception {
-    URI shortUri = new URI("dart:coreimpl");
-    URI fullUri = packageLibraryManager.expandRelativeDartUri(shortUri);
-    URI translatedURI = packageLibraryManager.resolveDartUri(fullUri);
-    assertNotNull(translatedURI);
-    String scheme = translatedURI.getScheme();
-    assertTrue(scheme.equals("file"));
-    assertTrue(getPath(translatedURI).endsWith("/coreimpl.dart"));
-  }
-
-  public void testTranslate3() throws Exception {
     URI fullUri = new URI("dart://doesnotexist/some/file.dart");
     URI translatedURI = packageLibraryManager.resolveDartUri(fullUri);
     assertNotNull(translatedURI);