Deprecate *_EXPORT_PRIVATE macros.

base/metrics/histogram.h

Index: base/metrics/histogram.h
diff --git a/base/metrics/histogram.h b/base/metrics/histogram.h
index 1f6e2a1ceeb7ac9f37aba10e2da37004d2d019dd..15e0ec2e3ccc56b07476f47107302c25959bb772 100644
--- a/base/metrics/histogram.h
+++ b/base/metrics/histogram.h
@@ -224,7 +224,7 @@ class BASE_EXPORT Histogram : public HistogramBase {
   friend class StatisticsRecorder;  // To allow it to delete duplicates.
   friend class StatisticsRecorderTest;
 
-  friend BASE_EXPORT_PRIVATE HistogramBase* DeserializeHistogramInfo(
+  friend BASE_EXPORT HistogramBase* DeserializeHistogramInfo(
       base::PickleIterator* iter);
   static HistogramBase* DeserializeInfoImpl(base::PickleIterator* iter);
 
@@ -349,7 +349,7 @@ class BASE_EXPORT LinearHistogram : public Histogram {
   bool PrintEmptyBucket(size_t index) const override;
 
  private:
-  friend BASE_EXPORT_PRIVATE HistogramBase* DeserializeHistogramInfo(
+  friend BASE_EXPORT HistogramBase* DeserializeHistogramInfo(
       base::PickleIterator* iter);
   static HistogramBase* DeserializeInfoImpl(base::PickleIterator* iter);
 
@@ -379,7 +379,7 @@ class BASE_EXPORT BooleanHistogram : public LinearHistogram {
  private:
   BooleanHistogram(const std::string& name, const BucketRanges* ranges);
 
-  friend BASE_EXPORT_PRIVATE HistogramBase* DeserializeHistogramInfo(
+  friend BASE_EXPORT HistogramBase* DeserializeHistogramInfo(
       base::PickleIterator* iter);
   static HistogramBase* DeserializeInfoImpl(base::PickleIterator* iter);
 
@@ -427,7 +427,7 @@ class BASE_EXPORT CustomHistogram : public Histogram {
   double GetBucketSize(Count current, size_t i) const override;
 
  private:
-  friend BASE_EXPORT_PRIVATE HistogramBase* DeserializeHistogramInfo(
+  friend BASE_EXPORT HistogramBase* DeserializeHistogramInfo(
       base::PickleIterator* iter);
   static HistogramBase* DeserializeInfoImpl(base::PickleIterator* iter);