Task manager should support Idle Wakeups on Windows

chrome/browser/task_management/task_manager_browsertest.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stddef.h>
 #include <vector>
 
 #include "base/files/file_path.h"
 #include "base/macros.h"
 #include "base/path_service.h"
@@ skipping 843 matching lines @@
   // Wait for the heap stats to reflect this.
   ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerStatToExceed(
       MatchTab("title1.html"), ColumnSpecifier::V8_MEMORY, minimal_heap_size));
   ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerStatToExceed(
       MatchTab("title1.html"), ColumnSpecifier::V8_MEMORY_USED,
       minimal_heap_size));
   ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(1, MatchAnyTab()));
   ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(1, MatchTab("title1.html")));
 }
 
+// Checks that task manager counts idle wakeups.
+IN_PROC_BROWSER_TEST_F(TaskManagerBrowserTest,
+                       IdleWakeups) {
+  ShowTaskManager();
+  model()->ToggleColumnVisibility(ColumnSpecifier::IDLE_WAKEUPS);
+
+  ui_test_utils::NavigateToURL(browser(), GetTestURL());
+
+  std::string test_js =
+    "function myWait() {\n"
+    "  setTimeout(function() { myWait(); }, 1)\n"
+    "}\n"
+    "myWait();\n"
+    "window.domAutomationController.send(\"okay\");\n";
+
+  std::string ok;
+  ASSERT_TRUE(content::ExecuteScriptAndExtractString(
+      browser()->tab_strip_model()->GetActiveWebContents(), test_js, &ok));
+  ASSERT_EQ("okay", ok);
+
+  // The script above should trigger a lot of idle wakeups - up to 1000 per
+  // second. Let's make sure we get at least 100 (in case the test runs slow).
+  ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerStatToExceed(
+      MatchTab("title1.html"), ColumnSpecifier::IDLE_WAKEUPS, 100));
+  ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(1, MatchAnyTab()));
+  ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(1, MatchTab("title1.html")));
+}
+
 // Checks that task manager counts utility process JS heap size.
 IN_PROC_BROWSER_TEST_F(TaskManagerUtilityProcessBrowserTest,
                        UtilityJSHeapMemory) {
   ShowTaskManager();
   model()->ToggleColumnVisibility(ColumnSpecifier::V8_MEMORY);
 
   auto proxy_resolver_name =
       l10n_util::GetStringUTF16(IDS_UTILITY_PROCESS_PROXY_RESOLVER_NAME);
   ui_test_utils::NavigateToURL(browser(), GetTestURL());
   // The PAC script is trivial, so don't expect a large heap.
@@ skipping 384 matching lines @@
 
     // Because the subframes for tab 2 are nested, their order is deterministic.
     EXPECT_EQ("Subframe: http://a.com/",
               base::UTF16ToUTF8(model()->GetRowTitle(tab2_start + 1)));
     EXPECT_EQ("Subframe: http://c.com/",
               base::UTF16ToUTF8(model()->GetRowTitle(tab2_start + 2)));
     EXPECT_EQ("Subframe: http://b.com/",
               base::UTF16ToUTF8(model()->GetRowTitle(tab2_start + 3)));
   }
 }