Remove name parameter from HistogramAdd function.

webrtc/system_wrappers/source/metrics_default.cc

Index: webrtc/system_wrappers/source/metrics_default.cc
diff --git a/webrtc/system_wrappers/source/metrics_default.cc b/webrtc/system_wrappers/source/metrics_default.cc
index fd7610b1130bdd5956ceb8516ee7fb510206fd7d..8ee10bacbc9e974484177d1b52a2c97205c82d38 100644
--- a/webrtc/system_wrappers/source/metrics_default.cc
+++ b/webrtc/system_wrappers/source/metrics_default.cc
@@ -232,23 +232,13 @@ Histogram* HistogramFactoryGetEnumeration(const std::string& name,
   return map->GetEnumerationHistogram(name, boundary);
 }
 
-// Fast path. Adds |sample| to cached |histogram_pointer|.
-void HistogramAdd(Histogram* histogram_pointer,
-                  const std::string& name,
-                  int sample) {
-  if (!histogram_pointer)
-    return;
-
+const std::string& GetHistogramName(Histogram* histogram_pointer) {
   RtcHistogram* ptr = reinterpret_cast<RtcHistogram*>(histogram_pointer);
-  RTC_DCHECK_EQ(name, ptr->name()) << "The name should not vary.";
-  ptr->Add(sample);
+  return ptr->name();
 }
 
 // Fast path. Adds |sample| to cached |histogram_pointer|.
 void HistogramAdd(Histogram* histogram_pointer, int sample) {
-  if (!histogram_pointer)
-    return;
-
   RtcHistogram* ptr = reinterpret_cast<RtcHistogram*>(histogram_pointer);
   ptr->Add(sample);
 }