Revert of Use TaskScheduler instead of blocking pool in wizard_controller.cc.

chrome/browser/chromeos/login/wizard_controller.cc

Index: chrome/browser/chromeos/login/wizard_controller.cc
diff --git a/chrome/browser/chromeos/login/wizard_controller.cc b/chrome/browser/chromeos/login/wizard_controller.cc
index e7ff0a385948276558f6c5b3e022403afb0c092a..39b5604b3413c0469aa96a2eec0151c137864beb 100644
--- a/chrome/browser/chromeos/login/wizard_controller.cc
+++ b/chrome/browser/chromeos/login/wizard_controller.cc
@@ -21,7 +21,6 @@
 #include "base/metrics/histogram_macros.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/utf_string_conversions.h"
-#include "base/task_scheduler/post_task.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/browser_process_platform_part.h"
@@ -223,6 +222,7 @@
 #if defined(GOOGLE_CHROME_BUILD)
 void InitializeCrashReporter() {
   // The crash reporter initialization needs IO to complete.
+  DCHECK(BrowserThread::GetBlockingPool()->RunsTasksOnCurrentThread());
   breakpad::InitCrashReporter(std::string());
 }
 #endif
@@ -718,10 +718,8 @@
   if (!enabled)
     return;
 #if defined(GOOGLE_CHROME_BUILD)
-  if (!base::PostTaskWithTraits(FROM_HERE,
-                                base::TaskTraits().MayBlock().WithPriority(
-                                    base::TaskPriority::BACKGROUND),
-                                base::Bind(&InitializeCrashReporter))) {
+  if (!content::BrowserThread::PostBlockingPoolTask(
+          FROM_HERE, base::Bind(&InitializeCrashReporter))) {
     LOG(ERROR) << "Failed to start crash reporter initialization.";
   }
 #endif