[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 7df2d3b35796f59da34150fd95c74e43dbb41be8..f3e93300344db152ccdfd3008b88a4dec36e7e34 100644
--- a/net/android/java/src/org/chromium/net/ProxyChangeListener.java
+++ b/net/android/java/src/org/chromium/net/ProxyChangeListener.java
@@ -73,11 +73,6 @@ public class ProxyChangeListener {
     }
 
     @CalledByNative
-    public static String getProperty(String property) {
-        return System.getProperty(property);
-    }
-
-    @CalledByNative
     public void start(long nativePtr) {
         assert mNativePtr == 0;
         mNativePtr = nativePtr;