[Remoting Android] Fix GetWeakPtr() calls on multiple threads

remoting/client/jni/chromoting_jni_instance.cc

 // 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.
 
 #include "remoting/client/jni/chromoting_jni_instance.h"
 
 #include <android/log.h>
 #include <stdint.h>
 
 #include "base/bind.h"
@@ skipping 56 matching lines @@
     : jni_runtime_(jni_runtime),
       jni_client_(jni_client),
       secret_fetcher_(secret_fetcher),
       host_jid_(host_jid),
       flags_(flags),
       cursor_shape_stub_(std::move(cursor_shape_stub)),
       video_renderer_(std::move(video_renderer)),
       capabilities_(capabilities),
       weak_factory_(this) {
   DCHECK(jni_runtime_->ui_task_runner()->BelongsToCurrentThread());
+  weak_ptr_ = weak_factory_.GetWeakPtr();
 
   // Initialize XMPP config.
   xmpp_config_.host = kXmppServer;
   xmpp_config_.port = kXmppPort;
   xmpp_config_.use_tls = kXmppUseTls;
   xmpp_config_.username = username;
   xmpp_config_.auth_token = auth_token;
 
   client_auth_config_.host_id = host_id;
   client_auth_config_.pairing_client_id = pairing_id;
@@ skipping 275 matching lines @@
 protocol::CursorShapeStub* ChromotingJniInstance::GetCursorShapeStub() {
   return cursor_shape_stub_.get();
 }
 
 void ChromotingJniInstance::InjectClipboardEvent(
     const protocol::ClipboardEvent& event) {
   NOTIMPLEMENTED();
 }
 
 base::WeakPtr<ChromotingJniInstance> ChromotingJniInstance::GetWeakPtr() {
-  return weak_factory_.GetWeakPtr();
+  return weak_ptr_;
 }
 
 void ChromotingJniInstance::ConnectToHostOnNetworkThread() {
   DCHECK(jni_runtime_->network_task_runner()->BelongsToCurrentThread());
 
   jingle_glue::JingleThreadWrapper::EnsureForCurrentMessageLoop();
 
   client_context_.reset(new ClientContext(jni_runtime_->network_task_runner()));
   client_context_->Start();
 
@@ skipping 113 matching lines @@
   video_renderer_.reset();
   signaling_.reset();
   perf_tracker_.reset();
   client_context_.reset();
   cursor_shape_stub_.reset();
 
   weak_factory_.InvalidateWeakPtrs();
 }
 
 }  // namespace remoting