Deprecate *_EXPORT_PRIVATE macros.

base/metrics/sparse_histogram.h

Index: base/metrics/sparse_histogram.h
diff --git a/base/metrics/sparse_histogram.h b/base/metrics/sparse_histogram.h
index 3abd08053696d1e2b1bb5c85136ff3ed26db56a5..241d975fdd94da9469777f814090458b28cd0ee5 100644
--- a/base/metrics/sparse_histogram.h
+++ b/base/metrics/sparse_histogram.h
@@ -28,7 +28,7 @@ namespace base {
 
 class HistogramSamples;
 
-class BASE_EXPORT_PRIVATE SparseHistogram : public HistogramBase {
+class BASE_EXPORT SparseHistogram : public HistogramBase {
  public:
   // If there's one with same name, return the existing one. If not, create a
   // new one.
@@ -57,7 +57,7 @@ class BASE_EXPORT_PRIVATE SparseHistogram : public HistogramBase {
   // Clients should always use FactoryGet to create SparseHistogram.
   explicit SparseHistogram(const std::string& name);
 
-  friend BASE_EXPORT_PRIVATE HistogramBase* DeserializeHistogramInfo(
+  friend BASE_EXPORT HistogramBase* DeserializeHistogramInfo(
       base::PickleIterator* iter);
   static HistogramBase* DeserializeInfoImpl(base::PickleIterator* iter);