Let MetricsService know about some Android Activities

base/metrics/histogram.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Histogram is an object that aggregates statistics, and can summarize them in
 // various forms, including ASCII graphical, HTML, and numerically (as a
 // vector of numbers corresponding to each of the aggregating buckets).
 
 // It supports calls to accumulate either time intervals (which are processed
 // as integral number of milliseconds), or arbitrary integral units.
@@ skipping 328 matching lines @@
     name, sample, 1, 1000, 50)
 
 #define UMA_HISTOGRAM_PERCENTAGE(name, under_one_hundred) \
     UMA_HISTOGRAM_ENUMERATION(name, under_one_hundred, 101)
 
 #define UMA_HISTOGRAM_BOOLEAN(name, sample) \
     STATIC_HISTOGRAM_POINTER_BLOCK(name, AddBoolean(sample), \
         base::BooleanHistogram::FactoryGet(name, \
             base::HistogramBase::kUmaTargetedHistogramFlag))
 
+// This is a helper macro used by other macros and shouldn't be used directly.
+#define UMA_HISTOGRAM_ENUMERATION_WITH_FLAG(name, sample, boundary_value, flag) \

[Alexei Svitkine (slow), 2014/01/29 16:54:09]

Nit: Seems this goes over the 80 char limit. Maybe rename boundary_value to
boundary to make it fit?

[Kibeom Kim (inactive), 2014/01/29 20:16:07]

Done.

+    STATIC_HISTOGRAM_POINTER_BLOCK(name, Add(sample), \
+        base::LinearHistogram::FactoryGet(name, 1, boundary_value, \
+            boundary_value + 1, flag))
+
 // The samples should always be strictly less than |boundary_value|.  For more
 // details, see the comment for the |HISTOGRAM_ENUMERATION| macro, above.
 #define UMA_HISTOGRAM_ENUMERATION(name, sample, boundary_value) \
-    STATIC_HISTOGRAM_POINTER_BLOCK(name, Add(sample), \
-        base::LinearHistogram::FactoryGet(name, 1, boundary_value, \
-            boundary_value + 1, base::HistogramBase::kUmaTargetedHistogramFlag))
+    UMA_HISTOGRAM_ENUMERATION_WITH_FLAG(name, sample, boundary_value, \
+        base::HistogramBase::kUmaTargetedHistogramFlag)
+
+// In addition to UMA_HISTOGRAM_ENUMERATION, this adds |kStabilityHistogramFlag|
+// to the histogram. Use this if you are recording stability histogram, that
+// should be a part of the initial stability log.
+#define UMA_STABILITY_HISTOGRAM_ENUMERATION(name, sample, boundary_value) \
+    UMA_HISTOGRAM_ENUMERATION_WITH_FLAG(name, sample, boundary_value, \
+        base::HistogramBase::kUmaStabilityHistogramFlag)
 
 #define UMA_HISTOGRAM_CUSTOM_ENUMERATION(name, sample, custom_ranges) \
     STATIC_HISTOGRAM_POINTER_BLOCK(name, Add(sample), \
         base::CustomHistogram::FactoryGet(name, custom_ranges, \
             base::HistogramBase::kUmaTargetedHistogramFlag))
 
 //------------------------------------------------------------------------------
 
 class BucketRanges;
 class SampleVector;
@@ skipping 307 matching lines @@
   static bool ValidateCustomRanges(const std::vector<Sample>& custom_ranges);
   static BucketRanges* CreateBucketRangesFromCustomRanges(
       const std::vector<Sample>& custom_ranges);
 
   DISALLOW_COPY_AND_ASSIGN(CustomHistogram);
 };
 
 }  // namespace base
 
 #endif  // BASE_METRICS_HISTOGRAM_H_