Add Static Initializer for leak detector TLS

components/metrics/leak_detector/leak_detector.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 "components/metrics/leak_detector/leak_detector.h"
 
 #include <stdint.h>
 
 #include <algorithm>
 
 #include "base/allocator/allocator_extension.h"
 #include "base/bind.h"
 #include "base/lazy_instance.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/numerics/safe_conversions.h"
 #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
 #else
 #error "Getting binary mapping info is not supported on this platform."
 #endif  // defined(OS_CHROMEOS)
 
 namespace metrics {
 
 using InternalLeakReport = leak_detector::LeakDetectorImpl::LeakReport;
@@ skipping 122 matching lines @@
       (hook_data.entered_hook ? 1 : 0) | (hook_data.alloc_size << 1);
   g_hook_data_tls.Get().Set(reinterpret_cast<void*>(ptr_value));
 }
 
 }  // namespace
 
 // static
 LeakDetector* LeakDetector::GetInstance() {
   return g_instance.Pointer();
 }
+// static

[jochen (gone - plz use gerrit), 2016/06/01 15:11:28]

nit. empty line above this line

[Simon Que, 2016/06/02 17:55:17]

Done.

+void LeakDetector::StaticInit() {
+  g_hook_data_tls.Get();

[Primiano Tucci (use gerrit), 2016/06/01 21:26:30]

ignore_result(g_hook_data_tls.Pointer()); just to document a bit more the intent

[Simon Que, 2016/06/02 17:55:17]

Done.

+}
 
 void LeakDetector::Init(const MemoryLeakReportProto::Params& params,
                         scoped_refptr<base::TaskRunner> task_runner) {
   DCHECK(thread_checker_.CalledOnValidThread());
   DCHECK_GT(params.sampling_rate(), 0);
 
   sampling_factor_ =
       base::saturated_cast<uint64_t>(params.sampling_rate() * UINT64_MAX);
 
   analysis_interval_bytes_ = params.analysis_interval_bytes();
@@ skipping 158 matching lines @@
     return;
   }
 
   {
     base::AutoLock lock(observers_lock_);
     FOR_EACH_OBSERVER(Observer, observers_, OnLeaksFound(reports));
   }
 }
 
 }  // namespace metrics