Simple fallback implementation.

chrome/android/java/src/org/chromium/chrome/browser/net/spdyproxy/DataReductionProxySettings.java

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.chrome.browser.net.spdyproxy;
 
 import org.chromium.base.CalledByNative;
 import org.chromium.base.ThreadUtils;
 
 public class DataReductionProxySettings {
@@ skipping 80 matching lines @@
     }
 
     /**
      * Returns the current data reduction proxy origin.
      */
     public String getDataReductionProxyOrigin() {
         return nativeGetDataReductionProxyOrigin(mNativeDataReductionProxySettings);
     }
 
     /**
-     * Returns a configuration string for the data reduction proxy.
-     */
-    public String getDataReductionProxyAuth() {
-        return nativeGetDataReductionProxyAuth(mNativeDataReductionProxySettings);
-    }
-
-    /**
      * Sets the preference on whether to enable/disable the SPDY proxy. This will zero out the
      * data reduction statistics if this is the first time the SPDY proxy has been enabled.
      */
     public void setDataReductionProxyEnabled(boolean enabled) {
         nativeSetDataReductionProxyEnabled(mNativeDataReductionProxySettings, enabled);
     }
 
     /** Returns true if the SPDY proxy is enabled. */
     public boolean isDataReductionProxyEnabled() {
         return nativeIsDataReductionProxyEnabled(mNativeDataReductionProxySettings);
@@ skipping 14 matching lines @@
 
     /**
      * Returns aggregate original and received content lengths.
      * @return The content lengths.
      */
     public ContentLengths getContentLengths() {
         return nativeGetContentLengths(mNativeDataReductionProxySettings);
     }
 
     /**
+     * Returns true if the host and realm describe an appropriate authentication challenge

[bengr, 2013/10/22 17:49:30]

I don't know what this comment means. Please clarify. How does a host and realm
describe anything?

[marq (ping after 24h), 2013/10/22 21:18:01]

Done.

+     * for the data reduction proxy.
+     */
+    public boolean isAcceptableAuthChallenge(String host, String realm) {

[bengr, 2013/10/22 17:49:30]

What makes it an appropriate challenge? 

[marq (ping after 24h), 2013/10/22 21:18:01]

Done.

+        return nativeIsAcceptableAuthChallenge(mNativeDataReductionProxySettings, host, realm);
+    }
+
+    /**
+     * Returns a string suitable for sending back to the data reduction proxy server to act as an

[bengr, 2013/10/22 17:49:30]

Returns an authentication token for the data reduction proxy.

[marq (ping after 24h), 2013/10/22 21:18:01]

Done.

+     * authentication token. If the token cannot be generated, an empty string is returned.
+     * @return The generated token.
+     */
+    public String getTokenForAuthChallenge(String host, String realm) {
+        return nativeGetTokenForAuthChallenge(mNativeDataReductionProxySettings, host, realm);
+    }
+
+    /**
      * Retrieves the history of daily totals of bytes that would have been
      * received if no data reducing mechanism had been applied.
      * @return The history of daily totals
      */
     public long[] getOriginalNetworkStatsHistory() {
         return nativeGetDailyOriginalContentLengths(mNativeDataReductionProxySettings);
     }
 
     /**
      * Retrieves the history of daily totals of bytes that were received after
@@ skipping 24 matching lines @@
     private native void nativeBypassHostPattern(
             int nativeDataReductionProxySettingsAndroid, String pattern);
     private native void nativeBypassURLPattern(
             int nativeDataReductionProxySettingsAndroid, String pattern);
     private native boolean nativeIsDataReductionProxyAllowed(
             int nativeDataReductionProxySettingsAndroid);
     private native boolean nativeIsDataReductionProxyPromoAllowed(
             int nativeDataReductionProxySettingsAndroid);
     private native String nativeGetDataReductionProxyOrigin(
             int nativeDataReductionProxySettingsAndroid);
-    private native String nativeGetDataReductionProxyAuth(
-            int nativeDataReductionProxySettingsAndroid);
     private native boolean nativeIsDataReductionProxyEnabled(
             int nativeDataReductionProxySettingsAndroid);
     private native boolean nativeIsDataReductionProxyManaged(
             int nativeDataReductionProxySettingsAndroid);
     private native void nativeSetDataReductionProxyEnabled(
             int nativeDataReductionProxySettingsAndroid, boolean enabled);
     private native long nativeGetDataReductionLastUpdateTime(
             int nativeDataReductionProxySettingsAndroid);
     private native ContentLengths nativeGetContentLengths(
             int nativeDataReductionProxySettingsAndroid);
+    private native boolean nativeIsAcceptableAuthChallenge(
+            int nativeDataReductionProxySettingsAndroid, String host, String realm);
+    private native String nativeGetTokenForAuthChallenge(
+            int nativeDataReductionProxySettingsAndroid, String host, String realm);
     private native long[] nativeGetDailyOriginalContentLengths(
             int nativeDataReductionProxySettingsAndroid);
     private native long[] nativeGetDailyReceivedContentLengths(
             int nativeDataReductionProxySettingsAndroid);
 }