Add check for file:-navigations from PDFs

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 9805660b562c34e82cae189e4670abaace68eb8e..6a8e564b56f568f4ffa5d1539e0f8322c4ef1ad3 100644
--- a/chrome/browser/resources/pdf/pdf.js
+++ b/chrome/browser/resources/pdf/pdf.js
@@ -233,10 +233,9 @@ function PDFViewer(browserApi) {
   document.addEventListener('mouseout', this.handleMouseEvent_.bind(this));
 
   var isInTab = this.browserApi_.getStreamInfo().tabId != -1;
-  var isSourceFileUrl = this.originalUrl_.startsWith('file://');
   this.navigator_ = new Navigator(
       this.originalUrl_, this.viewport_, this.paramsParser_,
-      new NavigatorDelegate(isInTab, isSourceFileUrl));
+      new NavigatorDelegate(isInTab));
   this.viewportScroller_ =
       new ViewportScroller(this.viewport_, this.plugin_, window);