Align the interface of TestHarness defined in gpu_tests/webgl_conformance.py...

Align the interface of TestHarness defined in gpu_tests/webgl_conformance.py with that in third_party/webgl_conformance.

This is a re-submit of https://codereview.chromium.org/58833003, which was
reverted due to bot failures.

BUG=314997
TBR=kbr@chromium.org

Review URL: https://codereview.chromium.org/63243002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@233384 0039d316-1c4b-4281-b951-d872f2087c98

content/test/gpu/gpu_tests/webgl_conformance.py

@@ -29,7 +29,7 @@ conformance_harness_script = r"""
     testHarness._originalLog.apply(window.console, [msg]);
   }
 
-  testHarness.reportResults = function(success, msg) {
+  testHarness.reportResults = function(url, success, msg) {
     testHarness._allTestSucceeded = testHarness._allTestSucceeded && !!success;
     if(!success) {
       testHarness._failures++;
@@ -38,7 +38,7 @@ conformance_harness_script = r"""
       }
     }
   };
-  testHarness.notifyFinished = function() {
+  testHarness.notifyFinished = function(url) {
     testHarness._finished = true;
   };
   testHarness.navigateToPage = function(src) {