Integrate helper macros for calling histograms with different names (real-time vs screenshare and r…

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 169 matching lines @@
 #define RTC_HISTOGRAMS_ENUMERATION(index, name, sample, boundary) \
   RTC_HISTOGRAMS_COMMON(index, name, sample, \
       RTC_HISTOGRAM_ENUMERATION(name, sample, boundary))
 
 #define RTC_HISTOGRAMS_PERCENTAGE(index, name, sample) \
   RTC_HISTOGRAMS_COMMON(index, name, sample, \
       RTC_HISTOGRAM_PERCENTAGE(name, sample))
 
 #define RTC_HISTOGRAMS_COMMON(index, name, sample, macro_invocation) \
   do { \
-    RTC_DCHECK(index >= 0); \
-    RTC_DCHECK(index <= 2); \
     switch (index) { \
       case 0: \
         macro_invocation; \
         break; \
       case 1: \
         macro_invocation; \
         break; \
       case 2: \
         macro_invocation; \
         break; \
@@ skipping 26 matching lines @@
 // 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);
 
 }  // namespace metrics
 }  // namespace webrtc
 
 #endif  // WEBRTC_SYSTEM_WRAPPERS_INCLUDE_METRICS_H_