[Service] Refactor unload xwalk extension

unloadInstance() is introduced for optimizing memory on global
model. But with irregular crash problems on UvTaskRunner's
OnTimeout function, it try to access xwalk instance after deleted.

This patch will remove calling unloadInstance() API.
Unloading xwalk extension will be refactored below patch.

Related patch:
  https://review.tizen.org/gerrit/246586/

Change-Id: Ie6a74b815680f02530fd2553427d03bf1634d612
Signed-off-by: DongHyun Song <dh81.song@samsung.com>

diff --git a/wrt_app/common/wrt_xwalk_extension.ts b/wrt_app/common/wrt_xwalk_extension.ts
index f7ba13d94aac28d7dc72ba9c9df69b8b66bf808a..23106e6e5d9eb520aa29bb71ab46df8501422c63 100644 (file)
--- a/wrt_app/common/wrt_xwalk_extension.ts
+++ b/wrt_app/common/wrt_xwalk_extension.ts
@@ -220,9 +220,6 @@ export const setRuntimeMessageHandler = (handler: (type: string, data?: string,
 }
 
 export let cleanup = () => {
-  for (var name in extensions_) {
-    extensions_[name].unloadInstance();
-  }
   delete global.tizen;
   instance = undefined;
 }