Rename RTC_HISTOGRAM_* macros to RTC_HISTOGRAM_*_SPARSE_* to indicate that these are for infrequent

webrtc/system_wrappers/include/metrics.h

Index: webrtc/system_wrappers/include/metrics.h
diff --git a/webrtc/system_wrappers/include/metrics.h b/webrtc/system_wrappers/include/metrics.h
index 2e6e7b7b6b867d535b1069f6e1d1e6df5c149adc..5e8ca11e9184ef85c4b1777b7d9650c0a342c835 100644
--- a/webrtc/system_wrappers/include/metrics.h
+++ b/webrtc/system_wrappers/include/metrics.h
@@ -69,44 +69,43 @@
 // Also consider changing string to const char* when switching to atomics.
 
 // Histogram for counters.
-#define RTC_HISTOGRAM_COUNTS_100(name, sample) RTC_HISTOGRAM_COUNTS( \
-    name, sample, 1, 100, 50)
+#define RTC_HISTOGRAM_COUNTS_SPARSE_100(name, sample) \
+  RTC_HISTOGRAM_COUNTS_SPARSE(name, sample, 1, 100, 50)
 
-#define RTC_HISTOGRAM_COUNTS_200(name, sample) RTC_HISTOGRAM_COUNTS( \
-    name, sample, 1, 200, 50)
+#define RTC_HISTOGRAM_COUNTS_SPARSE_200(name, sample) \
+  RTC_HISTOGRAM_COUNTS_SPARSE(name, sample, 1, 200, 50)
 
-#define RTC_HISTOGRAM_COUNTS_1000(name, sample) RTC_HISTOGRAM_COUNTS( \
-    name, sample, 1, 1000, 50)
+#define RTC_HISTOGRAM_COUNTS_SPARSE_1000(name, sample) \
+  RTC_HISTOGRAM_COUNTS_SPARSE(name, sample, 1, 1000, 50)
 
-#define RTC_HISTOGRAM_COUNTS_10000(name, sample) RTC_HISTOGRAM_COUNTS( \
-    name, sample, 1, 10000, 50)
+#define RTC_HISTOGRAM_COUNTS_SPARSE_10000(name, sample) \
+  RTC_HISTOGRAM_COUNTS_SPARSE(name, sample, 1, 10000, 50)
 
-#define RTC_HISTOGRAM_COUNTS_100000(name, sample) RTC_HISTOGRAM_COUNTS( \
-    name, sample, 1, 100000, 50)
+#define RTC_HISTOGRAM_COUNTS_SPARSE_100000(name, sample) \
+  RTC_HISTOGRAM_COUNTS_SPARSE(name, sample, 1, 100000, 50)
 
-#define RTC_HISTOGRAM_COUNTS(name, sample, min, max, bucket_count) \
-    RTC_HISTOGRAM_COMMON_BLOCK(name, sample, \
-        webrtc::metrics::HistogramFactoryGetCounts( \
-            name, min, max, bucket_count))
+#define RTC_HISTOGRAM_COUNTS_SPARSE(name, sample, min, max, bucket_count) \
+  RTC_HISTOGRAM_COMMON_BLOCK_SLOW(name, sample, \
+      webrtc::metrics::HistogramFactoryGetCounts( \
+          name, min, max, bucket_count))
 
 // Histogram for percentage.
-#define RTC_HISTOGRAM_PERCENTAGE(name, sample) \
-    RTC_HISTOGRAM_ENUMERATION(name, sample, 101)
+#define RTC_HISTOGRAM_PERCENTAGE_SPARSE(name, sample) \
+  RTC_HISTOGRAM_ENUMERATION_SPARSE(name, sample, 101)
 
 // Histogram for enumerators.
 // |boundary| should be above the max enumerator sample.
-#define RTC_HISTOGRAM_ENUMERATION(name, sample, boundary) \
-    RTC_HISTOGRAM_COMMON_BLOCK(name, sample, \
-        webrtc::metrics::HistogramFactoryGetEnumeration(name, boundary))
+#define RTC_HISTOGRAM_ENUMERATION_SPARSE(name, sample, boundary) \
+  RTC_HISTOGRAM_COMMON_BLOCK_SLOW(name, sample, \
+      webrtc::metrics::HistogramFactoryGetEnumeration(name, boundary))
 
-#define RTC_HISTOGRAM_COMMON_BLOCK(constant_name, sample, \
-                                   factory_get_invocation) \
+#define RTC_HISTOGRAM_COMMON_BLOCK_SLOW(constant_name, sample, \
+                                        factory_get_invocation) \
   do { \
     webrtc::metrics::Histogram* histogram_pointer = factory_get_invocation; \
     webrtc::metrics::HistogramAdd(histogram_pointer, constant_name, sample); \
   } while (0)
 
-
 namespace webrtc {
 namespace metrics {