Remove name parameter from HistogramAdd function.

webrtc/api/android/jni/androidmetrics_jni.cc

 /*
  *  Copyright 2016 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 50 matching lines @@
 
 JOW(jlong, Metrics_00024Histogram_nativeCreateCounts)
 (JNIEnv* jni, jclass, jstring j_name, jint min, jint max, jint buckets) {
   std::string name = JavaToStdString(jni, j_name);
   return jlongFromPointer(
       webrtc::metrics::HistogramFactoryGetCounts(name, min, max, buckets));
 }
 
 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