Add FlutterDesktopViewDestroy (#310)

* The engine owned by the view will also be shut down implicitly.

Signed-off-by: Boram Bae <[email protected]>

Author: bbrto21

shell/platform/tizen/flutter_tizen.cc

@@ -181,6 +181,11 @@ void FlutterDesktopEngineNotifyAppIsDetached(FlutterDesktopEngineRef engine) {
   EngineFromHandle(engine)->lifecycle_channel()->AppIsDetached();
 }
 
+void FlutterDesktopViewDestroy(FlutterDesktopViewRef view_ref) {
+  flutter::FlutterTizenView* view = ViewFromHandle(view_ref);
+  delete view;
+}
+
 void FlutterDesktopViewResize(FlutterDesktopViewRef view,
                               int32_t width,
                               int32_t height) {

shell/platform/tizen/public/flutter_tizen.h

@@ -152,14 +152,20 @@ FLUTTER_EXPORT FlutterDesktopViewRef FlutterDesktopViewCreateFromElmParent(
     FlutterDesktopEngineRef engine,
     void* parent);
 
+// Destroys the view.
+//
+// The engine owned by the view will also be shut down implicitly.
+// @warning This API is a work-in-progress and may change.
+FLUTTER_EXPORT void FlutterDesktopViewDestroy(FlutterDesktopViewRef view);
+
 // Returns a handle to evas object that the FlutterView is drawn to.
 //
 // Cast the returned void* to Evas_Object*.
 // @warning This API is a work-in-progress and may change.
 FLUTTER_EXPORT void* FlutterDesktopViewGetEvasObject(
     FlutterDesktopViewRef view);
 
-// Resize the FlutterView.
+// Resizes the view.
 // @warning This API is a work-in-progress and may change.
 FLUTTER_EXPORT void FlutterDesktopViewResize(FlutterDesktopViewRef view,
                                              int32_t width,