Let MetricsService know about some Android Activities

base/metrics/histogram.h

Index: base/metrics/histogram.h
diff --git a/base/metrics/histogram.h b/base/metrics/histogram.h
index 9845362d98aa31cad7557383e2fc1e039ad5f67e..29385dc86de99bd188cd7b3a9896d9bb112283dd 100644
--- a/base/metrics/histogram.h
+++ b/base/metrics/histogram.h
@@ -346,12 +346,24 @@ class Lock;
         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), \