TaskManagerBrowserTest.WebWorkerJSHeapMemory: update postMessage() usage.

chrome/browser/task_manager/task_manager_browsertest.cc

Index: chrome/browser/task_manager/task_manager_browsertest.cc
diff --git a/chrome/browser/task_manager/task_manager_browsertest.cc b/chrome/browser/task_manager/task_manager_browsertest.cc
index 2cd1796a4e096271e3f6b03c9d813e0b1f15656e..2f6b1bdb8d61cd7fee9ceca0229ed4c8e1863985 100644
--- a/chrome/browser/task_manager/task_manager_browsertest.cc
+++ b/chrome/browser/task_manager/task_manager_browsertest.cc
@@ -787,7 +787,7 @@ IN_PROC_BROWSER_TEST_F(TaskManagerBrowserTest, DISABLED_WebWorkerJSHeapMemory) {
       "var blob = new Blob([\n"
       "    'mem = new Array(%lu);',\n"
       "    'for (var i = 0; i < mem.length; i += 16) mem[i] = i;',\n"
-      "    'postMessage();']);\n"
+      "    'postMessage(i);']);\n"
       "blobURL = window.URL.createObjectURL(blob);\n"
       "worker = new Worker(blobURL);\n"
       "// Give the task manager few seconds to poll for JS heap sizes.\n"
@@ -795,7 +795,7 @@ IN_PROC_BROWSER_TEST_F(TaskManagerBrowserTest, DISABLED_WebWorkerJSHeapMemory) {
       "    this,\n"
       "    function () { window.domAutomationController.send(true); },\n"
       "    %d);\n"
-      "worker.postMessage();\n",
+      "worker.postMessage('go');\n",
       static_cast<unsigned long>(minimal_heap_size),
       GetUpdateTimeMs() + extra_timeout_ms);
   bool ok;