rebaseline_server: add "show thumbnails" option, and skip display of nonexistent images

gm/rebaseline_server/static/loader.js

 /*
  * Loader:
  * Reads GM result reports written out by results.py, and imports
  * them into $scope.extraColumnHeaders and $scope.imagePairs .
  */
 var Loader = angular.module(
     'Loader',
     ['ConstantsModule', 'diff_viewer']
 );
 
@@ skipping 274 matching lines @@
         },
         'save': function(nameValuePairs, name) {
           nameValuePairs[name] = Object.keys($scope[name]).join(',');
         }
       },
 
     };
 
     // parameter name -> copier objects to load/save parameter value
     $scope.queryParameters.map = {
-      'resultsToLoad':       $scope.queryParameters.copiers.simple,
-      'displayLimitPending': $scope.queryParameters.copiers.simple,
-      'imageSizePending':    $scope.queryParameters.copiers.simple,
-      'sortColumnSubdict':   $scope.queryParameters.copiers.simple,
-      'sortColumnKey':       $scope.queryParameters.copiers.simple,
+      'resultsToLoad':         $scope.queryParameters.copiers.simple,
+      'displayLimitPending':   $scope.queryParameters.copiers.simple,
+      'showThumbnailsPending': $scope.queryParameters.copiers.simple,
+      'imageSizePending':      $scope.queryParameters.copiers.simple,
+      'sortColumnSubdict':     $scope.queryParameters.copiers.simple,
+      'sortColumnKey':         $scope.queryParameters.copiers.simple,
 
       'hiddenResultTypes': $scope.queryParameters.copiers.set,
       'hiddenConfigs':     $scope.queryParameters.copiers.set,
     };
     $scope.queryParameters.map[constants.KEY__EXTRACOLUMN__BUILDER] =
         $scope.queryParameters.copiers.categoryValueMatch;
     $scope.queryParameters.map[constants.KEY__EXTRACOLUMN__TEST] =
         $scope.queryParameters.copiers.categoryValueMatch;
 
     // Loads all parameters into $scope from the URL query string;
@@ skipping 79 matching lines @@
         $scope.filteredImagePairs =
             $filter("orderBy")(
                 $filter("filter")(
                     $scope.imagePairs,
                     {tab: $scope.viewingTab},
                     true
                 ),
                 $scope.getSortColumnValue);
         $scope.limitedImagePairs = $scope.filteredImagePairs;
       }
+      $scope.showThumbnails = $scope.showThumbnailsPending;
       $scope.imageSize = $scope.imageSizePending;
       $scope.setUpdatesPending(false);
       $scope.queryParameters.save();
     }
 
     /**
      * Re-sort the displayed results.
      *
      * @param subdict (string): which subdictionary
      *     (constants.KEY__DIFFERENCE_DATA, constants.KEY__EXPECTATIONS_DATA,
@@ skipping 343 matching lines @@
      */
     $scope.getImageDiffRelativeUrl = function(imagePair) {
       var before =
           imagePair[constants.KEY__IMAGE_A_URL] + "-vs-" +
           imagePair[constants.KEY__IMAGE_B_URL];
       return before.replace(/[^\w\-]/g, "_") + ".png";
     }
 
   }
 );