Refactoring: de-couple Extensions from "script injection System" [render side] : 1

extensions/browser/guest_view/web_view/web_view_guest.h

Index: extensions/browser/guest_view/web_view/web_view_guest.h
diff --git a/extensions/browser/guest_view/web_view/web_view_guest.h b/extensions/browser/guest_view/web_view/web_view_guest.h
index a7ccfffba570f867ffbf32dcdfb4d1d1e79acd17..c75d16f9f6d48506adc4bdc01b12e0bcfee1d911 100644
--- a/extensions/browser/guest_view/web_view/web_view_guest.h
+++ b/extensions/browser/guest_view/web_view/web_view_guest.h
@@ -62,6 +62,12 @@ class WebViewGuest : public GuestView<WebViewGuest>,
       int embedder_process_id,
       int web_view_instance_id);
 
+  // Return the stored script injection instance ID of the given guest.
+  // Will generate an ID for the first query.
+  static int GetOrGenerateScriptInjectionInstanceID(
+      int embedder_process_id,
+      int guest_instance_id);
+
   // Request navigating the guest to the provided |src| URL.
   void NavigateGuest(const std::string& src, bool force_navigation);