Usage of new API, cleanups (reduced)

src/org/adblockplus/libadblockplus/JsValue.java

Index: src/org/adblockplus/libadblockplus/JsValue.java
diff --git a/src/org/adblockplus/libadblockplus/JsValue.java b/src/org/adblockplus/libadblockplus/JsValue.java
index bb47ddae5068d1f16fd0a52530874e2c300184f3..f3dd4eafe5ba5f6fc34e885f6c5fe3c425ba37b4 100644
--- a/src/org/adblockplus/libadblockplus/JsValue.java
+++ b/src/org/adblockplus/libadblockplus/JsValue.java
@@ -100,9 +100,9 @@ public class JsValue implements Disposable
     return asBoolean(this.ptr);
   }
 
-  public boolean isValid()
+  public JsValue getProperty(final String name)
   {
-    return isValid(this.ptr);
+    return getProperty(this.ptr, name);
   }
 
   public List<JsValue> asList()
@@ -156,7 +156,7 @@ public class JsValue implements Disposable
 
   private final static native boolean asBoolean(long ptr);
 
-  private final static native boolean isValid(long ptr);
+  private final static native JsValue getProperty(long ptr, String name);
 
   private final static native List<JsValue> asList(long ptr);