Leak reports collect information about the memory usage

chrome/browser/metrics/leak_detector/leak_detector_controller.h

Index: chrome/browser/metrics/leak_detector/leak_detector_controller.h
diff --git a/chrome/browser/metrics/leak_detector/leak_detector_controller.h b/chrome/browser/metrics/leak_detector/leak_detector_controller.h
index 6651bb790795625e490be584b6b1a2b3101ae51d..e7bd69505eba44d762c7f7ffc8cdb34d9512c773 100644
--- a/chrome/browser/metrics/leak_detector/leak_detector_controller.h
+++ b/chrome/browser/metrics/leak_detector/leak_detector_controller.h
@@ -12,11 +12,29 @@
 #include "base/macros.h"
 #include "base/threading/thread_checker.h"
 #include "chrome/browser/metrics/leak_detector/leak_detector_remote_controller.h"
+#include "chrome/browser/metrics/metrics_memory_details.h"
 #include "components/metrics/leak_detector/leak_detector.h"
 #include "components/metrics/proto/memory_leak_report.pb.h"
 
 namespace metrics {
 
+// Accumulates total memory usage info inside MetricsMemoryDetails.
+class TotalMemoryGrowthTracker : public MemoryGrowthTracker {
+ public:
+  TotalMemoryGrowthTracker();
+  ~TotalMemoryGrowthTracker();
+
+  // Updates the inner counter by sample (in kb). Returns always false
+  // to suppress generating growth/shrink histograms in MetricsMemoryDetails.
+  bool UpdateSample(base::ProcessId pid, int sample, int* diff) override;
+
+  size_t GetTotalUsageKb() const;
+  void Reset();
+
+ private:
+  size_t total_usage_kb_;
+};
+
 // This class initializes the LeakDetector on the browser process and registers
 // itself to be notified of leak reports.
 class LeakDetectorController
@@ -30,6 +48,10 @@ class LeakDetectorController
   // |stored_reports_| is empty afterwards.
   void GetLeakReports(std::vector<MemoryLeakReportProto>* reports);
 
+  // Method called from MetricsMemoryDetails when memory usage gets measured.
+  // Updates |memory_usage_info| in stored_reports_[i] for i >= |index|.
+  void OnMemoryDetailCollectionDone(size_t index);
+
  protected:
   // LeakDetector::Observer:
   void OnLeaksFound(const std::vector<MemoryLeakReportProto>& reports) override;
@@ -85,6 +107,15 @@ class LeakDetectorController
   // For thread safety.
   base::ThreadChecker thread_checker_;
 
+  // An object passed to MetricsMemoryDetails for collecting memory usage.
+  TotalMemoryGrowthTracker total_memory_growth_tracker_;
+
+  // For passing |this| into a callback.
+  base::WeakPtrFactory<LeakDetectorController> weak_ptr_factory_;
+
+  // Indicates that collecting memory usage is running.
+  bool waiting_for_collect_memory_usage_;
+
   DISALLOW_COPY_AND_ASSIGN(LeakDetectorController);
 };