build: fix build with enable_pdf_viewer=false (#25494) (#25521)

shell/browser/extensions/electron_extensions_api_client.cc

@@ -7,13 +7,14 @@
 #include <memory>
 #include <string>
 
+#include "electron/buildflags/buildflags.h"
 #include "extensions/browser/guest_view/mime_handler_view/mime_handler_view_guest_delegate.h"
 #include "printing/buildflags/buildflags.h"
 #include "shell/browser/extensions/api/management/electron_management_api_delegate.h"
 #include "shell/browser/extensions/electron_extension_web_contents_observer.h"
 #include "shell/browser/extensions/electron_messaging_delegate.h"
 
-#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
+#if BUILDFLAG(ENABLE_PDF_VIEWER)
 #include "components/pdf/browser/pdf_web_contents_helper.h"
 #include "shell/browser/electron_pdf_web_contents_helper_client.h"
 #endif
@@ -54,7 +55,7 @@ void ElectronExtensionsAPIClient::AttachWebContentsHelpers(
   extensions::ElectronExtensionWebContentsObserver::CreateForWebContents(
       web_contents);
 
-#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
+#if BUILDFLAG(ENABLE_PDF_VIEWER)
   pdf::PDFWebContentsHelper::CreateForWebContentsWithClient(
       web_contents, std::make_unique<ElectronPDFWebContentsHelperClient>());
 #endif