Enable Sdch in Cronet

components/cronet/android/cronet_url_request_context_adapter.cc

 // Copyright 2014 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.
 
 #include "components/cronet/android/cronet_url_request_context_adapter.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "base/bind.h"
 #include "base/files/file_util.h"
@@ skipping 143 matching lines @@
   context_builder.set_proxy_config_service(proxy_config_service_.release());
   config->ConfigureURLRequestContextBuilder(&context_builder);
 
   context_.reset(context_builder.Build());
 
   default_load_flags_ = net::LOAD_DO_NOT_SAVE_COOKIES |
                         net::LOAD_DO_NOT_SEND_COOKIES;
   if (config->load_disable_cache)
     default_load_flags_ |= net::LOAD_DISABLE_CACHE;
 
+  if (config->enable_sdch) {
+    sdch_owner_.reset(
+        new net::SdchOwner(context_->sdch_manager(), context_.get()));

[mef, 2015/04/16 16:04:19]

Add DCHECK(context_->sdch_manager())? 
I know, that it should exist, but wouldn't hurt to verify.

[xunjieli, 2015/04/16 19:36:57]

Done.

+  }
+
   // Currently (circa M39) enabling QUIC requires setting probability threshold.
   if (config->enable_quic) {
     context_->http_server_properties()
         ->SetAlternateProtocolProbabilityThreshold(0.0f);
     for (auto hint = config->quic_hints.begin();
          hint != config->quic_hints.end(); ++hint) {
       const URLRequestContextConfig::QuicHint& quic_hint = **hint;
       if (quic_hint.host.empty()) {
         LOG(ERROR) << "Empty QUIC hint host: " << quic_hint.host;
         continue;
@@ skipping 150 matching lines @@
 }
 
 static jint SetMinLogLevel(JNIEnv* env, jclass jcaller, jint jlog_level) {
   jint old_log_level = static_cast<jint>(logging::GetMinLogLevel());
   // MinLogLevel is global, shared by all URLRequestContexts.
   logging::SetMinLogLevel(static_cast<int>(jlog_level));
   return old_log_level;
 }
 
 }  // namespace cronet