Index: base/metrics/histogram_samples.h |
diff --git a/base/metrics/histogram_samples.h b/base/metrics/histogram_samples.h |
index 76f84ff571f27d2a8f10852e0d11e1f1027c348e..efd7e5e1f04ce233ecf641ab7ac679df20a992e2 100644 |
--- a/base/metrics/histogram_samples.h |
+++ b/base/metrics/histogram_samples.h |
@@ -55,6 +55,7 @@ class BASE_EXPORT HistogramSamples { |
virtual HistogramBase::Count GetCount(HistogramBase::Sample value) const = 0; |
virtual HistogramBase::Count TotalCount() const = 0; |
+ virtual void Negate() = 0; |
virtual void Add(const HistogramSamples& other); |
// Add from serialized samples. |