diff --git a/dom/canvas/test/webgl/resources/webgl-test-harness.js b/dom/canvas/test/webgl/resources/webgl-test-harness.js
--- a/dom/canvas/test/webgl/resources/webgl-test-harness.js
+++ b/dom/canvas/test/webgl/resources/webgl-test-harness.js
@@ -362,18 +362,16 @@ TestHarness.prototype.addFiles_ = functi
   }
   log("total files: " + files.length);
   for (var ii = 0; ii < files.length; ++ii) {
     log("" + ii + ": " + files[ii]);
     this.files.push(new TestFile(files[ii]));
     this.reportFunc(TestHarness.reportType.ADD_PAGE, files[ii], undefined);
   }
   this.reportFunc(TestHarness.reportType.READY, undefined, undefined);
-  this.nextFileIndex = files.length;
-  this.lastFileIndex = files.length;
 }
 
 TestHarness.prototype.runTests = function(opt_start, opt_count) {
   var count = opt_count || this.files.length;
   this.nextFileIndex = opt_start || 0;
   this.lastFileIndex = this.nextFileIndex + count;
   this.startNextFile();
 };