[Remoting Android] Fix race condition when initializing JniDisplayHandler

remoting/client/jni/jni_gl_display_handler.cc

Index: remoting/client/jni/jni_gl_display_handler.cc
diff --git a/remoting/client/jni/jni_gl_display_handler.cc b/remoting/client/jni/jni_gl_display_handler.cc
index 742c088c144698720839840f1d8537adc31df12a..45c3252b02ae7de70127be8b038d15fd3f042b2a 100644
--- a/remoting/client/jni/jni_gl_display_handler.cc
+++ b/remoting/client/jni/jni_gl_display_handler.cc
@@ -83,12 +83,13 @@ JniGlDisplayHandler::Core::Core(ChromotingJniRuntime* runtime,
                                 base::WeakPtr<JniGlDisplayHandler> shell)
     : runtime_(runtime), shell_(shell), weak_factory_(this) {
   DCHECK(!runtime_->display_task_runner()->BelongsToCurrentThread());
+
+  weak_ptr_ = weak_factory_.GetWeakPtr();
+
   runtime_->display_task_runner()->PostTask(
       FROM_HERE, base::Bind(&JniGlDisplayHandler::Core::Initialize,
                             base::Unretained(this)));
 
-  weak_ptr_ = weak_factory_.GetWeakPtr();
-
   // Do not bind GlRenderer::OnFrameReceived. |renderer_| is not ready yet.
   owned_frame_consumer_.reset(new DualBufferFrameConsumer(
       base::Bind(&JniGlDisplayHandler::Core::OnFrameReceived, weak_ptr_),