Revert "binding: Makes window/frames/self attributes return itself."

third_party/WebKit/LayoutTests/resources/testharnessreport.js

 /*
  * THIS FILE INTENTIONALLY LEFT BLANK
  *
  * More specifically, this file is intended for vendors to implement
  * code needed to integrate testharness.js tests with their own test systems.
  *
  * Typically such integration will attach callbacks when each test is
  * has run, using add_result_callback(callback(test)), or when the whole test file has
  * completed, using add_completion_callback(callback(tests, harness_status)).
  *
@@ skipping 195 matching lines @@
                     sanitize(tests[i].message) + "\n";
             }
         }
 
         resultStr += "Harness: the test ran to completion.\n";
 
         // Set results element's textContent to the results string.
         results.textContent = resultStr;
 
         function done() {
-            if (self.testRunner) {
+            // A temporary workaround since |window.self| property lookup starts
+            // failing if the frame is detached. |output_document| may be an
+            // ancestor of |self| so clearing |textContent| may detach |self|.
+            // To get around this, cache window.self now and use the cached
+            // value.
+            // TODO(dcheng): Remove this hack after fixing window/self/frames
+            // lookup in https://crbug.com/618672
+            var cachedSelf = window.self;
+            if (cachedSelf.testRunner) {
                 // The following DOM operations may show console messages.  We
                 // suppress them because they are not related to the running
                 // test.
                 testRunner.setDumpConsoleMessages(false);
 
                 if (isCSSWGTest() || isJSTest()) {
                     // Anything isn't material to the testrunner output, so
                     // should be hidden from the text dump.
                     if (output_document.body && output_document.body.tagName == 'BODY')
                         output_document.body.textContent = '';
                 }
             }
 
             // Add results element to output_document.
             if (!output_document.body || output_document.body.tagName != 'BODY') {
                 if (!output_document.documentElement)
                     output_document.appendChild(output_document.createElement('html'));
                 else if (output_document.body) // output_document.body is <frameset>.
                     output_document.body.remove();
                 output_document.documentElement.appendChild(output_document.createElement("body"));
             }
             output_document.body.appendChild(results);
 
-            if (self.testRunner)
+            if (cachedSelf.testRunner)
                 testRunner.notifyDone();
         }
 
         if (didDispatchLoadEvent || output_document.readyState != 'loading') {
             // This function might not be the last 'completion callback', and
             // another completion callback might generate more results.  So, we
             // don't dump the results immediately.
             setTimeout(done, 0);
         } else {
             // Parsing the test HTML isn't finished yet.
             window.addEventListener('load', done);
         }
     });
 
 })();