Add the viewer toolbar to the PDF extension

chrome/browser/resources/pdf/background.js

Index: chrome/browser/resources/pdf/background.js
diff --git a/chrome/browser/resources/pdf/background.js b/chrome/browser/resources/pdf/background.js
index 0a37f6d631340b18e4cf88f9ff0d19b0d12cb0ad..06f5b2e0d768225039bf04a19d041ac281247e11 100644
--- a/chrome/browser/resources/pdf/background.js
+++ b/chrome/browser/resources/pdf/background.js
@@ -7,6 +7,6 @@ chrome.streamsPrivate.onExecuteMimeTypeHandler.addListener(
     // TODO(raymes): Currently this doesn't work with embedded PDFs (it
     // causes the entire frame to navigate). Also work out how we can
     // mask the URL with the URL of the PDF.
-    chrome.tabs.update(tab_id, { url: 'pdf.html?' + content_url });
+    chrome.tabs.update(tab_id, { url: 'index.html?' + content_url });
   }
 );