Native memory histograms for the browser.

tools/perf/perf_tools/memory_benchmark.py

Index: tools/perf/perf_tools/memory_benchmark.py
diff --git a/tools/perf/perf_tools/memory_benchmark.py b/tools/perf/perf_tools/memory_benchmark.py
index 0a1ebee832d01b59c42d54bc8b00cd54e5a49c83..27405734b3ba28f3a0526a2c1ab236139d32bf91 100644
--- a/tools/perf/perf_tools/memory_benchmark.py
+++ b/tools/perf/perf_tools/memory_benchmark.py
@@ -9,6 +9,9 @@ MEMORY_HISTOGRAMS = [
     {'name': 'V8.MemoryHeapSampleTotalUsed', 'units': 'kb'},
     {'name': 'Memory.RendererUsed', 'units': 'kb'}]
 
+BROWSER_MEMORY_HISTOGRAMS =  [
+    {'name': 'Memory.BrowserUsed', 'units': 'kb'}]
+
 class MemoryBenchmark(multi_page_benchmark.MultiPageBenchmark):
   def __init__(self):
     super(MemoryBenchmark, self).__init__('stress_memory')
@@ -29,10 +32,17 @@ class MemoryBenchmark(multi_page_benchmark.MultiPageBenchmark):
 
   def MeasurePage(self, page, tab, results):
     for histogram in MEMORY_HISTOGRAMS:
-      name = histogram['name']
-      data = tab.EvaluateJavaScript(
-          'window.domAutomationController.getHistogram ? '
-          'window.domAutomationController.getHistogram("%s") : ""' % name)
-      if data:
-        results.Add(name.replace('.', '_'), histogram['units'], data,
-                    data_type='histogram')
+      self._GetHistogramFromDomAutomation(tab, 'getHistogram', histogram,
+                                          results)
+    for histogram in BROWSER_MEMORY_HISTOGRAMS:
+      self._GetHistogramFromDomAutomation(tab, 'getBrowserHistogram', histogram,
+                                          results)
+
+  def _GetHistogramFromDomAutomation(self, tab, func, histogram, results):
+    name = histogram['name']
+    js = ('window.domAutomationController.%s ? '
+          'window.domAutomationController.%s("%s") : ""' % (func, func, name))
+    data = tab.EvaluateJavaScript(js)
+    if data:
+      results.Add(name.replace('.', '_'), histogram['units'], data,
+                  data_type='histogram')