Type check PDF plugin JS code, down to 53 errors.

chrome/browser/resources/pdf/open_pdf_params_parser.js

Index: chrome/browser/resources/pdf/open_pdf_params_parser.js
diff --git a/chrome/browser/resources/pdf/open_pdf_params_parser.js b/chrome/browser/resources/pdf/open_pdf_params_parser.js
index 00f44773f464287cb95ad7c2eb581bd19496d8c2..04eedf3da15f9222c5fdeaf18eca444c521a35c2 100644
--- a/chrome/browser/resources/pdf/open_pdf_params_parser.js
+++ b/chrome/browser/resources/pdf/open_pdf_params_parser.js
@@ -9,6 +9,7 @@
  * passed in the url to set initial viewport settings for opening the pdf.
  * @param {Object} getNamedDestinationsFunction The function called to fetch
  *     the page number for a named destination.
+ * @constructor
  */
 function OpenPDFParamsParser(getNamedDestinationsFunction) {
   this.outstandingRequests_ = [];
@@ -21,7 +22,7 @@ OpenPDFParamsParser.prototype = {
    * Parse zoom parameter of open PDF parameters. If this
    * parameter is passed while opening PDF then PDF should be opened
    * at the specified zoom level.
-   * @param {number} zoom value.
+   * @param {string} paramValue zoom value.
    * @param {Object} viewportPosition to store zoom and position value.
    */
   parseZoomParam_: function(paramValue, viewportPosition) {
@@ -112,7 +113,7 @@ OpenPDFParamsParser.prototype = {
 
     if ('page' in paramsDictionary) {
       // |pageNumber| is 1-based, but goToPage() take a zero-based page number.
-      var pageNumber = parseInt(paramsDictionary['page']);
+      var pageNumber = parseInt(paramsDictionary['page'], 10);
       if (!isNaN(pageNumber) && pageNumber > 0)
         viewportPosition['page'] = pageNumber - 1;
     }