Make URLRequestContextAdapter initialization asynchronous

components/cronet/android/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/url_request_context_adapter.h"
 
 #include "base/bind.h"
 #include "base/files/file_util.h"
 #include "base/single_thread_task_runner.h"
 #include "components/cronet/url_request_context_config.h"
@@ skipping 160 matching lines @@
       }
 
       net::HostPortPair quic_hint_host_port_pair(quic_hint.host,
                                                  quic_hint.port);
       context_->http_server_properties()->SetAlternateProtocol(
           quic_hint_host_port_pair,
           static_cast<uint16>(quic_hint.alternate_port),
           net::AlternateProtocol::QUIC,
           1.0f);
     }
+    is_context_initialized_ = true;
+    while (!tasks_.empty()) {
+      tasks_.front().Run();
+      tasks_.pop();
+    }
   }
 
   if (VLOG_IS_ON(2)) {
     net_log_observer_.reset(new NetLogObserver());
     context_->net_log()->AddThreadSafeObserver(net_log_observer_.get(),
                                                net::NetLog::LOG_ALL_BUT_BYTES);
   }
 
   delegate_->OnContextInitialized(this);
 }
 
+// Runs a task that might depend on the context being initialized.
+// This method can be called on any thread.
+void URLRequestContextAdapter::RunTask(
+    const RunAfterContextInitTask& callback) {
+  GetNetworkTaskRunner()->PostTask(
+      FROM_HERE,
+      base::Bind(
+          &URLRequestContextAdapter::RunTaskOnNetworkThread, this, callback));
+}
+
+// This method should only be run on the network thread.
+void URLRequestContextAdapter::RunTaskOnNetworkThread(
+    const RunAfterContextInitTask& callback) {
+  if (is_context_initialized_) {
+    callback.Run();
+    return;
+  }
+  tasks_.push(callback);
+}
+
 URLRequestContextAdapter::~URLRequestContextAdapter() {
   if (net_log_observer_) {
     context_->net_log()->RemoveThreadSafeObserver(net_log_observer_.get());
     net_log_observer_.reset();
   }
   StopNetLog();
   // TODO(mef): Ensure that |network_thread_| is destroyed properly.
 }
 
 const std::string& URLRequestContextAdapter::GetUserAgent(
@@ skipping 34 matching lines @@
     net_log_logger_.reset();
   }
 }
 
 void NetLogObserver::OnAddEntry(const net::NetLog::Entry& entry) {
   VLOG(2) << "Net log entry: type=" << entry.type()
           << ", source=" << entry.source().type << ", phase=" << entry.phase();
 }
 
 }  // namespace cronet