Revert of Allow custom metrics implementations on Android.

webrtc/api/android/java/src/org/webrtc/Histogram.java

Index: webrtc/api/android/java/src/org/webrtc/Histogram.java
diff --git a/webrtc/api/android/java/src/org/webrtc/Histogram.java b/webrtc/api/android/java/src/org/webrtc/Histogram.java
deleted file mode 100644
index 877986134afbd90498110d3dec77ef964ed567cd..0000000000000000000000000000000000000000
--- a/webrtc/api/android/java/src/org/webrtc/Histogram.java
+++ /dev/null
@@ -1,44 +0,0 @@
-/*
- *  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.
- */
-
-package org.webrtc;
-
-/**
- * Class for holding the native pointer of a histogram. Since there is no way to destroy a
- * histogram, please don't create unnecessary instances of this object. This class is thread safe.
- *
- * Usage example:
- * private static final Histogram someMetricHistogram =
- *     Histogram.createCounts("WebRTC.Video.SomeMetric", 1, 10000, 50);
- * someMetricHistogram.addSample(someVariable);
- */
-class Histogram {
-  private final long handle;
-
-  private Histogram(long handle) {
-    this.handle = handle;
-  }
-
-  static public Histogram createCounts(String name, int min, int max, int bucketCount) {
-    return new Histogram(nativeCreateCounts(name, min, max, bucketCount));
-  }
-
-  static public Histogram createEnumeration(String name, int max) {
-    return new Histogram(nativeCreateEnumeration(name, max));
-  }
-
-  public void addSample(int sample) {
-    nativeAddSample(handle, sample);
-  }
-
-  private static native long nativeCreateCounts(String name, int min, int max, int bucketCount);
-  private static native long nativeCreateEnumeration(String name, int max);
-  private static native void nativeAddSample(long handle, int sample);
-}