Fix desktop.memory measurement to emit memory-infra dumps.

tools/perf/benchmarks/memory.py

Index: tools/perf/benchmarks/memory.py
diff --git a/tools/perf/benchmarks/memory.py b/tools/perf/benchmarks/memory.py
index 3b0df041247a9c3642998a2950d67d706018864b..d5b2122c9ae2c30e43971a3f5411a6eb931a42b0 100644
--- a/tools/perf/benchmarks/memory.py
+++ b/tools/perf/benchmarks/memory.py
@@ -56,9 +56,12 @@ class _MemoryInfra(perf_benchmark.PerfBenchmark):
 @benchmark.Owner(emails=['erikchen@chromium.org'])
 class MemoryBenchmarkTrivialSitesDesktop(_MemoryInfra):
   """Measure memory usage on trivial sites."""
-  page_set = page_sets.TrivialSitesStorySet
   options = {'pageset_repeat': 5}
 
+  def CreateStorySet(self, options):
+    return page_sets.TrivialSitesStorySet(wait_in_seconds=0,
+                                          measure_memory=True)
+
   @classmethod
   def Name(cls):
     return 'memory.desktop'