[Cronet] Enable Brotli

components/cronet/android/api/src/org/chromium/net/ICronetEngineBuilder.java

 // Copyright 2016 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.net;
 
 import java.util.Date;
 import java.util.Set;
 
 /**
  * Defines methods that the actual implementation of {@link CronetEngine.Builder} has to implement.
  * {@code CronetEngine.Builder} uses this interface to delegate the calls.
  * For the documentation of individual methods, please see the identically named methods in
  * {@link org.chromium.net.CronetEngine.Builder} and
  * {@link org.chromium.net.ExperimentalCronetEngine.Builder}.
  *
  * {@hide internal class}
  */
 public abstract class ICronetEngineBuilder {
     // Public API methods.
     public abstract ICronetEngineBuilder addPublicKeyPins(String hostName, Set<byte[]> pinsSha256,
             boolean includeSubdomains, Date expirationDate);
     public abstract ICronetEngineBuilder addQuicHint(String host, int port, int alternatePort);
     public abstract ICronetEngineBuilder enableDataReductionProxy(String key);
     public abstract ICronetEngineBuilder enableHttp2(boolean value);
     public abstract ICronetEngineBuilder enableHttpCache(int cacheMode, long maxSize);
     public abstract ICronetEngineBuilder enablePublicKeyPinningBypassForLocalTrustAnchors(
             boolean value);
     public abstract ICronetEngineBuilder enableQuic(boolean value);
     public abstract ICronetEngineBuilder enableSdch(boolean value);
+    public abstract ICronetEngineBuilder enableBrotli(boolean value);

[mef, 2017/04/12 17:45:49]

This method should have default 'do nothing' implementation to cover the case of
old implementation, which does not have it:

   public ICronetEngineBuilder enableBrotli(boolean value) {
      return this;
   }

[xunjieli, 2017/04/13 21:26:14]

Done.

     public abstract ICronetEngineBuilder setExperimentalOptions(String options);
     public abstract ICronetEngineBuilder setLibraryLoader(
             CronetEngine.Builder.LibraryLoader loader);
     public abstract ICronetEngineBuilder setStoragePath(String value);
     public abstract ICronetEngineBuilder setUserAgent(String userAgent);
     public abstract String getDefaultUserAgent();
     public abstract ExperimentalCronetEngine build();
 
     // Experimental API methods.
     //
     // Note: all experimental API methods should have default implementation. This will allow
     // removing the experimental methods from the implementation layer without breaking
     // the client.
 
     public ICronetEngineBuilder enableNetworkQualityEstimator(boolean value) {
         return this;
     }
 
     public ICronetEngineBuilder setCertVerifierData(String certVerifierData) {
         return this;
     }
 
     public ICronetEngineBuilder setDataReductionProxyOptions(
             String primaryProxy, String fallbackProxy, String secureProxyCheckUrl) {
         return this;
     }
 }