Move terminateApplication to an internal header

shell/platform/darwin/macos/framework/Headers/FlutterApplication.h

@@ -42,17 +42,6 @@
  * necessary from FlutterApplication.mm.
  */
 @interface FlutterApplication : NSApplication
-
-/**
- * FlutterApplication's implementation of |terminate| doesn't terminate the
- * application: that is left up to the engine, which will call this function if
- * it decides that termination request is granted, which will start the regular
- * Cocoa flow for terminating the application, calling
- * |applicationShouldTerminate|, etc.
- *
- * @param(sender) The id of the object requesting the termination, or nil.
- */
-- (void)terminateApplication:(id)sender;
 @end
 
 #endif  // FLUTTER_FLUTTERAPPLICATION_H_

shell/platform/darwin/macos/framework/Source/FlutterApplication.mm

@@ -3,6 +3,7 @@
 // found in the LICENSE file.
 
 #import "flutter/shell/platform/darwin/macos/framework/Headers/FlutterApplication.h"
+#import "flutter/shell/platform/darwin/macos/framework/Source/FlutterApplication_Internal.h"
 
 #include "flutter/shell/platform/embedder/embedder.h"
 #import "shell/platform/darwin/macos/framework/Headers/FlutterAppDelegate.h"

shell/platform/darwin/macos/framework/Source/FlutterApplication_Internal.h

@@ -0,0 +1,27 @@
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef FLUTTER_FLUTTERAPPLICATION_INTERNAL_H_
+#define FLUTTER_FLUTTERAPPLICATION_INTERNAL_H_
+
+#import "flutter/shell/platform/darwin/macos/framework/Headers/FlutterApplication.h"
+
+/**
+ * Define |terminateApplication| for internal use.
+ */
+@interface FlutterApplication ()
+
+/**
+ * FlutterApplication's implementation of |terminate| doesn't terminate the
+ * application: that is left up to the engine, which will call this function if
+ * it decides that termination request is granted, which will start the regular
+ * Cocoa flow for terminating the application, calling
+ * |applicationShouldTerminate|, etc.
+ *
+ * @param(sender) The id of the object requesting the termination, or nil.
+ */
+- (void)terminateApplication:(id)sender;
+@end
+
+#endif  // FLUTTER_FLUTTERAPPLICATION_INTERNAL_H_

shell/platform/darwin/macos/framework/Source/FlutterEngine.mm

@@ -15,6 +15,7 @@
 #import "flutter/shell/platform/darwin/macos/framework/Headers/FlutterAppDelegate.h"
 #import "flutter/shell/platform/darwin/macos/framework/Headers/FlutterApplication.h"
 #import "flutter/shell/platform/darwin/macos/framework/Source/FlutterAppDelegate_Internal.h"
+#import "flutter/shell/platform/darwin/macos/framework/Source/FlutterApplication_Internal.h"
 #import "flutter/shell/platform/darwin/macos/framework/Source/FlutterCompositor.h"
 #import "flutter/shell/platform/darwin/macos/framework/Source/FlutterDartProject_Internal.h"
 #import "flutter/shell/platform/darwin/macos/framework/Source/FlutterMenuPlugin.h"