Refactoring and rewriting the chromoting jni instance to be chromoting session.

remoting/client/jni/jni_runtime_delegate.cc

Index: remoting/client/jni/jni_runtime_delegate.cc
diff --git a/remoting/client/jni/jni_runtime_delegate.cc b/remoting/client/jni/jni_runtime_delegate.cc
index 095db0b03931335146daba12b6d6bd6fbeb1456d..35ddc8c4dca95eb61b939e3169e0ea040f3adf60 100644
--- a/remoting/client/jni/jni_runtime_delegate.cc
+++ b/remoting/client/jni/jni_runtime_delegate.cc
@@ -68,7 +68,7 @@ JniRuntimeDelegate* JniRuntimeDelegate::GetInstance() {
   return base::Singleton<JniRuntimeDelegate>::get();
 }
 
-JniRuntimeDelegate::JniRuntimeDelegate() {
+JniRuntimeDelegate::JniRuntimeDelegate() : weak_factory_(this) {
   runtime_ = ChromotingClientRuntime::GetInstance();
 }
 
@@ -76,6 +76,11 @@ JniRuntimeDelegate::~JniRuntimeDelegate() {
   runtime_ = nullptr;
 }
 
+base::WeakPtr<ChromotingClientRuntime::Delegate>
+JniRuntimeDelegate::GetWeakPtr() {
+  return weak_factory_.GetWeakPtr();
+}
+
 void JniRuntimeDelegate::RuntimeWillShutdown() {
   DCHECK(runtime_->ui_task_runner()->BelongsToCurrentThread());