From befbbc27d8abe5d41260704b4bacfb99373cc62f Mon Sep 17 00:00:00 2001
From: Shelley Vohr <shelley.vohr@gmail.com>
Date: Mon, 17 Aug 2020 08:25:20 -0700
Subject: [PATCH] fix: pdf download not working (#24946)

---
 .../extensions/electron_extensions_api_client.cc      | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/shell/browser/extensions/electron_extensions_api_client.cc b/shell/browser/extensions/electron_extensions_api_client.cc
index c280df252c6c..5da08766e7e9 100644
--- a/shell/browser/extensions/electron_extensions_api_client.cc
+++ b/shell/browser/extensions/electron_extensions_api_client.cc
@@ -8,9 +8,15 @@
 #include <string>
 
 #include "extensions/browser/guest_view/mime_handler_view/mime_handler_view_guest_delegate.h"
+#include "printing/buildflags/buildflags.h"
 #include "shell/browser/extensions/electron_extension_web_contents_observer.h"
 #include "shell/browser/extensions/electron_messaging_delegate.h"
 
+#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
+#include "components/pdf/browser/pdf_web_contents_helper.h"
+#include "shell/browser/electron_pdf_web_contents_helper_client.h"
+#endif
+
 namespace extensions {
 
 class ElectronMimeHandlerViewGuestDelegate
@@ -46,6 +52,11 @@ void ElectronExtensionsAPIClient::AttachWebContentsHelpers(
     content::WebContents* web_contents) const {
   extensions::ElectronExtensionWebContentsObserver::CreateForWebContents(
       web_contents);
+
+#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
+  pdf::PDFWebContentsHelper::CreateForWebContentsWithClient(
+      web_contents, std::make_unique<ElectronPDFWebContentsHelperClient>());
+#endif
 }
 
 std::unique_ptr<MimeHandlerViewGuestDelegate>