Make UMA stats creation available in the Java interface.

webrtc/system_wrappers/include/metrics.h

 //
 // Copyright (c) 2014 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 271 matching lines @@
 // Get histogram for enumerators.
 // |boundary| should be above the max enumerator sample.
 Histogram* HistogramFactoryGetEnumeration(
     const std::string& name, int boundary);
 
 // Function for adding a |sample| to a histogram.
 // |name| can be used to verify that it matches the histogram name.
 void HistogramAdd(
     Histogram* histogram_pointer, const std::string& name, int sample);
 
+// Function for adding a |sample| to a histogram without checkking the name.
+void HistogramAdd(Histogram* histogram_pointer, int sample);
+
 }  // namespace metrics
 }  // namespace webrtc
 
 #endif  // WEBRTC_SYSTEM_WRAPPERS_INCLUDE_METRICS_H_