Add Static Initializer for leak detector TLS

components/metrics/leak_detector/leak_detector.cc

Index: components/metrics/leak_detector/leak_detector.cc
diff --git a/components/metrics/leak_detector/leak_detector.cc b/components/metrics/leak_detector/leak_detector.cc
index b90d21833221c1627987e8aa6d19643cb15dde7a..5f33bab50fc7e9ffa661b08749068f8ec78f4014 100644
--- a/components/metrics/leak_detector/leak_detector.cc
+++ b/components/metrics/leak_detector/leak_detector.cc
@@ -17,6 +17,7 @@
 #include "base/threading/thread_local.h"
 #include "components/metrics/leak_detector/custom_allocator.h"
 #include "components/metrics/leak_detector/leak_detector_impl.h"
+#include "components/metrics/proto/memory_leak_report.pb.h"
 
 #if defined(OS_CHROMEOS)
 #include <link.h>  // for dl_iterate_phdr
@@ -160,6 +161,11 @@ LeakDetector* LeakDetector::GetInstance() {
   return g_instance.Pointer();
 }
 
+// static
+void LeakDetector::InitTLSSlot() {
+  ignore_result(g_hook_data_tls.Get());
+}
+
 void LeakDetector::Init(const MemoryLeakReportProto::Params& params,
                         scoped_refptr<base::TaskRunner> task_runner) {
   DCHECK(thread_checker_.CalledOnValidThread());