Call StatisticsRecorder::Initialize when a GlobalHistogramAllocator is created.

base/metrics/persistent_histogram_allocator.cc

Index: base/metrics/persistent_histogram_allocator.cc
diff --git a/base/metrics/persistent_histogram_allocator.cc b/base/metrics/persistent_histogram_allocator.cc
index 5320d3fa45920353dc272d0a4fab3a376208673e..92fdc86440696777f805b66ad74d102131a81662 100644
--- a/base/metrics/persistent_histogram_allocator.cc
+++ b/base/metrics/persistent_histogram_allocator.cc
@@ -897,7 +897,11 @@ void GlobalHistogramAllocator::DeletePersistentLocation() {
 GlobalHistogramAllocator::GlobalHistogramAllocator(
     std::unique_ptr<PersistentMemoryAllocator> memory)
     : PersistentHistogramAllocator(std::move(memory)),
-      import_iterator_(this) {}
+      import_iterator_(this) {
+  // Make sure the StatisticsRecorder is initialized to prevent duplicate
+  // histograms from being created. It's safe to call this multiple times.
+  StatisticsRecorder::Initialize();
+}
 
 void GlobalHistogramAllocator::ImportHistogramsToStatisticsRecorder() {
   // Skip the import if it's the histogram that was last created. Should a