testharnessreport: Support SVG testharness tests.

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 196 matching lines @@
             }
             resultStr += testResults;
         }
 
         resultStr += "Harness: the test ran to completion.\n";
 
         // Set results element's textContent to the results string.
         results.textContent = resultStr;
 
         function done() {
+            let xhtmlNS = 'http://www.w3.org/1999/xhtml';
+            var body = null;
+            if (output_document.body && output_document.body.tagName == 'BODY' && output_document.body.namespaceURI == xhtmlNS)
+                body = output_document.body;
             // 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);
 
                 // 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 = '';
+                if (body)
+                    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"));
+            if (!body) {
+                // output_document might be an SVG document.
+                if (output_document.documentElement)
+                    output_document.documentElement.remove();
+                let html = output_document.createElementNS(xhtmlNS, 'html');
+                output_document.appendChild(html);
+                body = output_document.createElementNS(xhtmlNS, 'body');
+                body.setAttribute('style', 'white-space:pre;');
+                html.appendChild(body);
             }
             output_document.body.appendChild(results);
 
             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);
         }
     });
 
 })();