GuestView: Move lifetime management out of content

extensions/browser/api/guest_view/guest_view_internal_api.h

Index: extensions/browser/api/guest_view/guest_view_internal_api.h
diff --git a/extensions/browser/api/guest_view/guest_view_internal_api.h b/extensions/browser/api/guest_view/guest_view_internal_api.h
index d6d54ce00c325eb8a4c459d3082c743abc7df02d..13d7a42d06cc733f2491b555b4429c48bf7ed99c 100644
--- a/extensions/browser/api/guest_view/guest_view_internal_api.h
+++ b/extensions/browser/api/guest_view/guest_view_internal_api.h
@@ -24,6 +24,21 @@ class GuestViewInternalCreateGuestFunction : public AsyncExtensionFunction {
   DISALLOW_COPY_AND_ASSIGN(GuestViewInternalCreateGuestFunction);
 };
 
+class GuestViewInternalDestroyGuestFunction : public AsyncExtensionFunction {
+ public:
+  DECLARE_EXTENSION_FUNCTION("guestViewInternal.destroyGuest",
+                             GUESTVIEWINTERNAL_DESTROYGUEST);
+  GuestViewInternalDestroyGuestFunction();
+
+ protected:
+  virtual ~GuestViewInternalDestroyGuestFunction();
+  virtual bool RunAsync() OVERRIDE FINAL;
+
+ private:
+  void DestroyGuestCallback(content::WebContents* guest_web_contents);
+  DISALLOW_COPY_AND_ASSIGN(GuestViewInternalDestroyGuestFunction);
+};
+
 class GuestViewInternalSetAutoSizeFunction : public AsyncExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("guestViewInternal.setAutoSize",