Fix navigations in OOP PDF

chrome/browser/resources/pdf/pdf.js

Index: chrome/browser/resources/pdf/pdf.js
diff --git a/chrome/browser/resources/pdf/pdf.js b/chrome/browser/resources/pdf/pdf.js
index 88e3d26bc5ee57ec2f9146b5605513fb2deda1ae..ff406973be98f1399a96aa2c817e992f18887094 100644
--- a/chrome/browser/resources/pdf/pdf.js
+++ b/chrome/browser/resources/pdf/pdf.js
@@ -397,10 +397,12 @@ PDFViewer.prototype = {
         this.updateProgress_(message.data.progress);
         break;
       case 'navigate':
-        if (message.data.newTab)
-          window.open(message.data.url);
-        else
-          window.location.href = message.data.url;
+        if (message.data.newTab) {
+          chrome.tabs.create({ url: message.data.url });
+        } else {
+          chrome.tabs.update(
+              this.streamDetails.tabId, { url: message.data.url });
+        }
         break;
       case 'setScrollPosition':
         var position = this.viewport_.position;