[tracing] directly use memory-infra from blink -> base

base/trace_event/memory_dump_provider.cc

+// Copyright 2015 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 "base/trace_event/memory_dump_provider.h"
+
+#include "base/thread_task_runner_handle.h"
+#include "base/trace_event/memory_dump_manager.h"
+
+namespace base {
+namespace trace_event {
+
+// static
+void MemoryDumpProvider::RegisterOnCurrentThread(
+    MemoryDumpProvider* dump_provider) {
+  MemoryDumpManager::GetInstance()->RegisterDumpProvider(
+      dump_provider, base::ThreadTaskRunnerHandle::Get());
+}
+
+// static
+void MemoryDumpProvider::Register(
+    MemoryDumpProvider* dump_provider,
+    const scoped_refptr<SingleThreadTaskRunner>& task_runner) {
+  MemoryDumpManager::GetInstance()->RegisterDumpProvider(dump_provider,
+                                                         task_runner);
+}
+
+// static
+void MemoryDumpProvider::Unregister(MemoryDumpProvider* dump_provider) {
+  MemoryDumpManager::GetInstance()->UnregisterDumpProvider(dump_provider);
+}
+
+}  // namespace trace_event
+}  // namespace base