Add sample Breakdowns to memoryMetric.

tracing/tracing/metrics/system_health/memory_metric.html

Index: tracing/tracing/metrics/system_health/memory_metric.html
diff --git a/tracing/tracing/metrics/system_health/memory_metric.html b/tracing/tracing/metrics/system_health/memory_metric.html
index 3000abbdb5770d4121e7961319805438368ce6cf..49133ff4345e858a1c5f1080d4afc4093dde7dc1 100644
--- a/tracing/tracing/metrics/system_health/memory_metric.html
+++ b/tracing/tracing/metrics/system_health/memory_metric.html
@@ -1198,6 +1198,17 @@ tr.exportTo('tr.metrics.sh', function() {
     return numeric;
   }
 
+  function buildSampleDiagnostics(value, node) {
+    const diagnostics = new Map();
+    const processes = new tr.v.d.Breakdown();
+    const components = new tr.v.d.Breakdown();
+    console.log(value, node);
+    if (processes.size > 0) diagnostics.set('processes', processes);
+    if (components.size > 0) diagnostics.set('components', components);
+    if (diagnostics.size === 0) return undefined;
+    return diagnostics;
+  }
+
   /**
    * Create a memory tr.v.Histogram with |unit| and add all total values in
    * |node| to it.
@@ -1205,7 +1216,10 @@ tr.exportTo('tr.metrics.sh', function() {
   function buildMemoryNumericFromNode(name, node, unit) {
     const histogram = new tr.v.Histogram(
         name, unit, BOUNDARIES_FOR_UNIT_MAP.get(unit));
-    node.values.forEach(v => histogram.addSample(v.total));
+
+    node.values.forEach(v => histogram.addSample(
+        v.total, buildSampleDiagnostics(v, node)));
+
     return histogram;
   }