Remove sparse macros (RTC_HISTOGRAM_*_SPARSE_*) that are no longer used.

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 68 matching lines @@
 
 #define RTC_HISTOGRAM_COUNTS(name, sample, min, max, bucket_count) \
   RTC_HISTOGRAM_COMMON_BLOCK(name, sample, \
       webrtc::metrics::HistogramFactoryGetCounts(name, min, max, bucket_count))
 
 // Deprecated.
 // TODO(asapersson): Remove.
 #define RTC_HISTOGRAM_COUNTS_SPARSE_100(name, sample) \
   RTC_HISTOGRAM_COUNTS_SPARSE(name, sample, 1, 100, 50)
 
-#define RTC_HISTOGRAM_COUNTS_SPARSE_200(name, sample) \
-  RTC_HISTOGRAM_COUNTS_SPARSE(name, sample, 1, 200, 50)
-
-#define RTC_HISTOGRAM_COUNTS_SPARSE_1000(name, sample) \
-  RTC_HISTOGRAM_COUNTS_SPARSE(name, sample, 1, 1000, 50)
-
-#define RTC_HISTOGRAM_COUNTS_SPARSE_10000(name, sample) \
-  RTC_HISTOGRAM_COUNTS_SPARSE(name, sample, 1, 10000, 50)
-
-#define RTC_HISTOGRAM_COUNTS_SPARSE_100000(name, sample) \
-  RTC_HISTOGRAM_COUNTS_SPARSE(name, sample, 1, 100000, 50)
-
 #define RTC_HISTOGRAM_COUNTS_SPARSE(name, sample, min, max, bucket_count) \
   RTC_HISTOGRAM_COMMON_BLOCK_SLOW(name, sample, \
       webrtc::metrics::HistogramFactoryGetCounts(name, min, max, bucket_count))
 
 // Histogram for percentage (evenly spaced buckets).
 #define RTC_HISTOGRAM_PERCENTAGE(name, sample) \
   RTC_HISTOGRAM_ENUMERATION(name, sample, 101)
 
-// Deprecated.
-// TODO(asapersson): Remove.
-#define RTC_HISTOGRAM_PERCENTAGE_SPARSE(name, sample) \
-  RTC_HISTOGRAM_ENUMERATION_SPARSE(name, sample, 101)
-
 // Histogram for enumerators (evenly spaced buckets).
 // |boundary| should be above the max enumerator sample.
 #define RTC_HISTOGRAM_ENUMERATION(name, sample, boundary) \
   RTC_HISTOGRAM_COMMON_BLOCK(name, sample, \
       webrtc::metrics::HistogramFactoryGetEnumeration(name, boundary))
 
-// Deprecated.
-// TODO(asapersson): Remove.
-#define RTC_HISTOGRAM_ENUMERATION_SPARSE(name, sample, boundary) \
-  RTC_HISTOGRAM_COMMON_BLOCK_SLOW(name, sample, \
-      webrtc::metrics::HistogramFactoryGetEnumeration(name, boundary))
-
 // The name of the histogram should not vary.
 // TODO(asapersson): Consider changing string to const char*.
 #define RTC_HISTOGRAM_COMMON_BLOCK(constant_name, sample, \
                                    factory_get_invocation) \
   do { \
     static webrtc::metrics::Histogram* atomic_histogram_pointer = nullptr; \
     webrtc::metrics::Histogram* histogram_pointer = \
         rtc::AtomicOps::AcquireLoadPtr(&atomic_histogram_pointer); \
     if (!histogram_pointer) { \
       histogram_pointer = factory_get_invocation; \
@@ skipping 90 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_