Revert of [Android] Add a java.lang.System wrapper.

net/android/java/src/org/chromium/net/ProxyChangeListener.java

Index: net/android/java/src/org/chromium/net/ProxyChangeListener.java
diff --git a/net/android/java/src/org/chromium/net/ProxyChangeListener.java b/net/android/java/src/org/chromium/net/ProxyChangeListener.java
index f3e93300344db152ccdfd3008b88a4dec36e7e34..7df2d3b35796f59da34150fd95c74e43dbb41be8 100644
--- a/net/android/java/src/org/chromium/net/ProxyChangeListener.java
+++ b/net/android/java/src/org/chromium/net/ProxyChangeListener.java
@@ -70,6 +70,11 @@
     @CalledByNative
     public static ProxyChangeListener create(Context context) {
         return new ProxyChangeListener(context);
+    }
+
+    @CalledByNative
+    public static String getProperty(String property) {
+        return System.getProperty(property);
     }
 
     @CalledByNative