PDF: Allow external navigation links in PDF bookmarks

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 4ea2b064ea053e11930d47ca86449094e41f1741..dab584d9d0bdc9afb6d3a68f1631627bba6bd8ac 100644
--- a/chrome/browser/resources/pdf/pdf.js
+++ b/chrome/browser/resources/pdf/pdf.js
@@ -237,6 +237,10 @@ function PDFViewer(browserApi) {
     this.viewport_.goToPage(e.detail.page);
   }.bind(this));
 
+  document.body.addEventListener('navigate', function(e) {
+    this.navigator_.navigate(e.detail.uri, e.detail.newtab);
+  }.bind(this));
+
   this.toolbarManager_ =
       new ToolbarManager(window, this.toolbar_, this.zoomToolbar_);