Remove some LazyInstance use in base/

base/files/file_descriptor_watcher_posix.cc

Index: base/files/file_descriptor_watcher_posix.cc
diff --git a/base/files/file_descriptor_watcher_posix.cc b/base/files/file_descriptor_watcher_posix.cc
index 49ac5d43a4a6080fbb18e0d63138c2480232b0dc..082ad9c063bde4632f93fdc439963ef7923abdc0 100644
--- a/base/files/file_descriptor_watcher_posix.cc
+++ b/base/files/file_descriptor_watcher_posix.cc
@@ -5,7 +5,6 @@
 #include "base/files/file_descriptor_watcher_posix.h"
 
 #include "base/bind.h"
-#include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
 #include "base/sequenced_task_runner.h"
@@ -20,8 +19,11 @@ namespace {
 
 // MessageLoopForIO used to watch file descriptors for which callbacks are
 // registered from a given thread.
-LazyInstance<ThreadLocalPointer<MessageLoopForIO>>::Leaky
-    tls_message_loop_for_io = LAZY_INSTANCE_INITIALIZER;
+ThreadLocalPointer<MessageLoopForIO>* GetTLSMessageLoopForIO() {
+  static auto tls_message_loop_for_io =
+      new ThreadLocalPointer<MessageLoopForIO>();
+  return tls_message_loop_for_io;
+}
 
 }  // namespace
 
@@ -152,7 +154,7 @@ FileDescriptorWatcher::Controller::Controller(MessageLoopForIO::Mode mode,
                                               const Closure& callback)
     : callback_(callback),
       message_loop_for_io_task_runner_(
-          tls_message_loop_for_io.Get().Get()->task_runner()),
+          GetTLSMessageLoopForIO()->Get()->task_runner()),
       weak_factory_(this) {
   DCHECK(!callback_.is_null());
   DCHECK(message_loop_for_io_task_runner_);
@@ -185,12 +187,12 @@ void FileDescriptorWatcher::Controller::RunCallback() {
 FileDescriptorWatcher::FileDescriptorWatcher(
     MessageLoopForIO* message_loop_for_io) {
   DCHECK(message_loop_for_io);
-  DCHECK(!tls_message_loop_for_io.Get().Get());
-  tls_message_loop_for_io.Get().Set(message_loop_for_io);
+  DCHECK(!GetTLSMessageLoopForIO());
+  GetTLSMessageLoopForIO()->Set(message_loop_for_io);
 }
 
 FileDescriptorWatcher::~FileDescriptorWatcher() {
-  tls_message_loop_for_io.Get().Set(nullptr);
+  GetTLSMessageLoopForIO()->Set(nullptr);
 }
 
 std::unique_ptr<FileDescriptorWatcher::Controller>