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 335 matching lines @@
         base::BooleanHistogram::FactoryGet(name, \
             base::HistogramBase::kUmaTargetedHistogramFlag))
 
 // 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))
 
+#define UMA_STABILITY_HISTOGRAM_ENUMERATION(name, sample, boundary_value) \

[Alexei Svitkine (slow), 2014/01/22 21:14:19]

Please add a comment that explains this macro (and when it should be used).

[Kibeom Kim (inactive), 2014/01/24 19:45:09]

Done.

+    STATIC_HISTOGRAM_POINTER_BLOCK(name, Add(sample), \

[Alexei Svitkine (slow), 2014/01/22 21:14:19]

I would maybe make an UMA_HISTOGRAM_ENUMERATION_WITH_FLAGS() macro that both
this and UMA_HISTOGRAM_ENUMERATION() use and specify different flags, to avoid
logic duplication between the two.

[Kibeom Kim (inactive), 2014/01/24 19:45:09]

Done.

+        base::LinearHistogram::FactoryGet(name, 1, boundary_value, \
+            boundary_value + 1, \
+            base::HistogramBase::kUmaTargetedStabilityHistogramFlag))
+
 #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 306 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_