Telemetry: integrates memory_measurement with TCMalloc dumps

tools/perf/perf_tools/memory_measurement.py

Index: tools/perf/perf_tools/memory_measurement.py
diff --git a/tools/perf/perf_tools/memory_measurement.py b/tools/perf/perf_tools/memory_measurement.py
index 8d1724d146681d588c7afa23d47ff1dd287cef09..1ac7d1c03d6d73deafed40375720824f91a54395 100644
--- a/tools/perf/perf_tools/memory_measurement.py
+++ b/tools/perf/perf_tools/memory_measurement.py
@@ -46,3 +46,16 @@ class MemoryMeasurement(page_measurement.PageMeasurement):
   def MeasurePage(self, page, tab, results):

[Dai Mikurube (NOT FULLTIME), 2013/05/14 15:07:07]

Just a question.  When is is called?

[bulach, 2013/05/14 15:34:17]

afaict, this is called after all actions for a given page has been executed..

[Dai Mikurube (NOT FULLTIME), 2013/05/14 17:02:10]

Got it.  Thanks!

     for h in self.histograms:
       h.GetValue(page, tab, results)
+    dumps = eval(tab.EvaluateJavaScript("""
+      if (chrome && chrome.memoryBenchmarking &&
+          chrome.memoryBenchmarking.isHeapProfilerRunning()) {

[Dai Mikurube (NOT FULLTIME), 2013/05/14 15:07:07]

I'm not confident whether we should always dump when
chrome.memoryBenchmarking.isHeapProfilerRunning() is true, or not.  How about
when --profiler-tool=tcmalloc?

[bulach, 2013/05/14 15:34:17]

good idea! done.

+        JSON.stringify([
+            chrome.memoryBenchmarking.heapProfilerDump('renderer'),
+            chrome.memoryBenchmarking.heapProfilerDump('browser'),
+        ]);
+      } else {
+        JSON.stringify([]);
+      }
+    """))
+    if dumps:
+      print 'Memory dumps available at ', dumps