WebView context menu cleanup.

extensions/browser/guest_view/web_view/web_view_guest.cc

Index: extensions/browser/guest_view/web_view/web_view_guest.cc
diff --git a/extensions/browser/guest_view/web_view/web_view_guest.cc b/extensions/browser/guest_view/web_view/web_view_guest.cc
index 4f49eb677917a6b0729b0a1b51348244db0ab263..b93a1f85de69068b5b9705dc278a3a9927d06109 100644
--- a/extensions/browser/guest_view/web_view/web_view_guest.cc
+++ b/extensions/browser/guest_view/web_view/web_view_guest.cc
@@ -40,6 +40,7 @@
 #include "extensions/browser/api/guest_view/web_view/web_view_internal_api.h"
 #include "extensions/browser/api/web_request/web_request_api.h"
 #include "extensions/browser/extension_system.h"
+#include "extensions/browser/extensions_browser_client.h"
 #include "extensions/browser/guest_view/web_view/web_view_constants.h"
 #include "extensions/browser/guest_view/web_view/web_view_content_script_manager.h"
 #include "extensions/browser/guest_view/web_view/web_view_permission_helper.h"
@@ -233,6 +234,10 @@ void WebViewGuest::CleanUp(int embedder_process_id, int view_instance_id) {
   // Clean up content scripts for the WebView.
   auto csm = WebViewContentScriptManager::Get(browser_context);
   csm->RemoveAllContentScriptsForWebView(embedder_process_id, view_instance_id);
+
+  // Allow an extensions browser client to potentially perform more cleanup.
+  ExtensionsBrowserClient::Get()->CleanUpWebView(embedder_process_id,
+                                                 view_instance_id);
 }
 
 // static