Add blink_perf.html_to_dom benchmark.

third_party/WebKit/PerformanceTests/resources/runner.js

Index: third_party/WebKit/PerformanceTests/resources/runner.js
diff --git a/third_party/WebKit/PerformanceTests/resources/runner.js b/third_party/WebKit/PerformanceTests/resources/runner.js
index 7874e39408daabd12c4367d6d69f1d6bb8fcbc13..2e986c44db5750ac4e12281369c3a067fc44fd03 100644
--- a/third_party/WebKit/PerformanceTests/resources/runner.js
+++ b/third_party/WebKit/PerformanceTests/resources/runner.js
@@ -331,5 +331,29 @@ if (window.testRunner) {
         PerfTestRunner.measureTime(test);
     }
 
+    // Support for benchmarks that run only once and produce multiple values.
+    // The intended use:
+    // 1. PerfTestRunner.startSingleRunBenchmark("Description")
+    // 2. PerfTestRunner.logValues("metric 1", values1, unit1);
+    // 3. PerfTestRunner.logValues("metric 2", values2, unit2);
+    // ...
+    // n. PerfTestRunner.finishSingleRunBenchmark()
+    PerfTestRunner.startSingleRunBenchmark = function(description) {
+        logLines = logLines || (window.testRunner ? [] : null);
+        this.log("Description: " + description);
+    }
+
+    PerfTestRunner.logValues = function (metric, values, unit) {
+        this.log("values " + metric + " " + values.join(", ") + " " + unit)
+    }
+
+    PerfTestRunner.finishSingleRunBenchmark = function() {
+        if (logLines)
+            logLines.forEach(logInDocument);
+        if (window.testRunner)
+            testRunner.notifyDone();
+    }
+
+
     window.PerfTestRunner = PerfTestRunner;
 })();