Add a hidden generic property interface

Change-Id: Iff890d7802af00a80b0148c7cc3233c6fc4d5dad

core/java/android/webkit/WebSettings.java

@@ -1782,6 +1782,20 @@ public class WebSettings {
         }
     }
 
+    /**
+     * @hide
+     */
+    public void setProperty(String key, String value) {
+        mWebView.nativeSetProperty(key, value);
+    }
+
+    /**
+     * @hide
+     */
+    public String getProperty(String key) {
+        return mWebView.nativeGetProperty(key);
+    }
+
     /**
      * Transfer messages from the queue to the new WebCoreThread. Called from
      * WebCore thread.

core/java/android/webkit/WebView.java

@@ -9234,4 +9234,6 @@ public class WebView extends AbsoluteLayout
      */
     private native boolean  nativeScrollLayer(int layer, int newX, int newY);
     private native int      nativeGetBackgroundColor();
+    native void     nativeSetProperty(String key, String value);
+    native String   nativeGetProperty(String key);
 }