Fix for PDFs with lots of named destinations take a long time to load.

chrome/browser/resources/pdf/navigator.js

Index: chrome/browser/resources/pdf/navigator.js
diff --git a/chrome/browser/resources/pdf/navigator.js b/chrome/browser/resources/pdf/navigator.js
index 57c15d4d26c47c983f83a839c766cb79d22f9dfe..74dde0d930954f13f5e95aed460a2d18055f626d 100644
--- a/chrome/browser/resources/pdf/navigator.js
+++ b/chrome/browser/resources/pdf/navigator.js
@@ -71,15 +71,9 @@ Navigator.prototype = {
       return;
     }
 
-    if (newTab) {
+    if (newTab)
       this.navigateInNewTabCallback_(url);
-    } else {
-      var pageNumber =
-          this.paramsParser_.getViewportFromUrlParams(url).page;
-      if (pageNumber != undefined)
-        this.viewport_.goToPage(pageNumber);
-      else
-        this.navigateInCurrentTabCallback_(url);
-    }

[raymes, 2015/02/12 22:19:04]

None of this should be removed. Instead the code should look like this:

  this.paramsParser_.getViewportFromUrlParams(url, onViewportReceived);
}

onViewportReceived: function(initialViewport) {
  var pageNumber = initialViewport.pageNumber;
  if (pageNumber != undefined)
    this.viewport_.goToPage(pageNumber);
  else
    this.navigateInCurrentTabCallback_(url);
});

+    else
+      this.navigateInCurrentTabCallback_(url);
   }
 };