Allow posting the CronetEngine UI Thread initialization on a custom Ui executor instead of the defa…

components/cronet/android/java/src/org/chromium/net/impl/CronetEngineBuilderImpl.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.impl;
 
 import android.content.Context;
 import android.support.annotation.IntDef;
 import android.support.annotation.VisibleForTesting;
 
 import static org.chromium.net.CronetEngine.Builder.HTTP_CACHE_DISABLED;
 import static org.chromium.net.CronetEngine.Builder.HTTP_CACHE_DISK;
 import static org.chromium.net.CronetEngine.Builder.HTTP_CACHE_DISK_NO_HTTP;
 import static org.chromium.net.CronetEngine.Builder.HTTP_CACHE_IN_MEMORY;
 
 import org.chromium.net.CronetEngine;
 import org.chromium.net.ICronetEngineBuilder;
 
 import java.io.File;
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.net.IDN;
 import java.util.Date;
 import java.util.HashSet;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.Set;
+import java.util.concurrent.Executor;
 import java.util.regex.Pattern;
 
 /**
  * Implementation of {@link ICronetEngineBuilder}.
  */
 public abstract class CronetEngineBuilderImpl extends ICronetEngineBuilder {
     /**
      * A hint that a host supports QUIC.
      */
     public static class QuicHint {
@@ skipping 36 matching lines @@
 
     // Private fields are simply storage of configuration for the resulting CronetEngine.
     // See setters below for verbose descriptions.
     private final Context mApplicationContext;
     private final List<QuicHint> mQuicHints = new LinkedList<>();
     private final List<Pkp> mPkps = new LinkedList<>();
     private boolean mPublicKeyPinningBypassForLocalTrustAnchorsEnabled;
     private String mUserAgent;
     private String mStoragePath;
     private VersionSafeCallbacks.LibraryLoader mLibraryLoader;
+    private Executor mUiExecutor;
     private boolean mQuicEnabled;
     private boolean mHttp2Enabled;
     private boolean mSdchEnabled;
     private String mDataReductionProxyKey;
     private String mDataReductionProxyPrimaryProxy;
     private String mDataReductionProxyFallbackProxy;
     private String mDataReductionProxySecureProxyCheckUrl;
     private boolean mDisableCache;
     private int mHttpCacheMode;
     private long mHttpCacheMaxSize;
@@ skipping 48 matching lines @@
     public CronetEngineBuilderImpl setLibraryLoader(CronetEngine.Builder.LibraryLoader loader) {
         mLibraryLoader = new VersionSafeCallbacks.LibraryLoader(loader);
         return this;
     }
 
     VersionSafeCallbacks.LibraryLoader libraryLoader() {
         return mLibraryLoader;
     }
 
     @Override
+    public CronetEngineBuilderImpl setUiThreadExecutor(Executor uiExecutor) {
+        mUiExecutor = uiExecutor;
+        return this;
+    }
+
+    Executor uiExecutor() {
+        return mUiExecutor;
+    }
+
+    @Override
     public CronetEngineBuilderImpl enableQuic(boolean value) {
         mQuicEnabled = value;
         return this;
     }
 
     boolean quicEnabled() {
         return mQuicEnabled;
     }
 
     /**
@@ skipping 255 matching lines @@
 
     /**
      * Returns {@link Context} for builder.
      *
      * @return {@link Context} for builder.
      */
     Context getContext() {
         return mApplicationContext;
     }
 }