Remove name parameter from HistogramAdd function.

webrtc/api/android/jni/androidmetrics_jni.cc

Index: webrtc/api/android/jni/androidmetrics_jni.cc
diff --git a/webrtc/api/android/jni/androidmetrics_jni.cc b/webrtc/api/android/jni/androidmetrics_jni.cc
index 833066a66f915ca06da2027dfddb79c8113fc613..68b0b73bbef85db9a07bb2709bf85c1530a8e5ff 100644
--- a/webrtc/api/android/jni/androidmetrics_jni.cc
+++ b/webrtc/api/android/jni/androidmetrics_jni.cc
@@ -68,8 +68,10 @@ JOW(jlong, Metrics_00024Histogram_nativeCreateCounts)
 
 JOW(void, Metrics_00024Histogram_nativeAddSample)
 (JNIEnv* jni, jclass, jlong histogram, jint sample) {
-  HistogramAdd(reinterpret_cast<webrtc::metrics::Histogram*>(histogram),
-               sample);
+  if (histogram) {

[tommi, 2016/09/15 17:16:48]

Would it be a programmer error if histogram is 0? If so, the check shouldn't be
needed 

[sakal, 2016/09/15 19:31:03]

No, this can happen in other cases as well. HistogramFactoryGet* returns null if
UMA stats are not enabled.

+    HistogramAdd(reinterpret_cast<webrtc::metrics::Histogram*>(histogram),
+                 sample);
+  }
 }
 
 }  // namespace webrtc_jni