Index: chrome/browser/resources/pdf/pdf_scripting_api.js |
diff --git a/chrome/browser/resources/pdf/pdf_scripting_api.js b/chrome/browser/resources/pdf/pdf_scripting_api.js |
index 03f14de64b5ab03f585a70932ed494f9ac1a9d31..c0b06d19221f51da2bf076dd919747c147f2e82e 100644 |
--- a/chrome/browser/resources/pdf/pdf_scripting_api.js |
+++ b/chrome/browser/resources/pdf/pdf_scripting_api.js |
@@ -263,6 +263,8 @@ function PDFCreateOutOfProcessPlugin(src) { |
iframe.setAttribute( |
'src', |
'chrome-extension://mhjfbmdgcfjbbpaeojofohoefgiehjai/index.html?' + src); |
+ // Prevent the frame from being tab-focusable. |
+ iframe.setAttribute('tabindex', '-1'); |
var client = new PDFScriptingAPI(window); |
iframe.onload = function() { |
client.setPlugin(iframe.contentWindow); |