[memory-infra] Add unittests for peak detection and NotifyDumpTriggered

base/trace_event/memory_dump_scheduler.h

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef BASE_TRACE_EVENT_MEMORY_DUMP_SCHEDULER_H
 #define BASE_TRACE_EVENT_MEMORY_DUMP_SCHEDULER_H
 
 #include "base/base_export.h"
 #include "base/gtest_prod_util.h"
 #include "base/memory/ref_counted.h"
@@ skipping 32 matching lines @@
 
   // Resets time for triggering dump to account for minimum time between the
   // dumps.
   void NotifyDumpTriggered();
 
   // Disables all triggers.
   void DisableAllTriggers();
 
  private:
   friend class MemoryDumpManagerTest;
+  friend class MemoryDumpSchedulerPollingTest;
   FRIEND_TEST_ALL_PREFIXES(MemoryDumpManagerTest, TestPollingOnDumpThread);
 
   // Helper class to schdule periodic memory dumps.
   struct PeriodicTriggerState {
     PeriodicTriggerState();
     ~PeriodicTriggerState();
 
     bool is_configured;
 
     RepeatingTimer timer;
@@ skipping 69 matching lines @@
   PeriodicTriggerState periodic_state_;
   PollingTriggerState polling_state_;
 
   DISALLOW_COPY_AND_ASSIGN(MemoryDumpScheduler);
 };
 
 }  // namespace trace_event
 }  // namespace base
 
 #endif  // BASE_TRACE_EVENT_MEMORY_DUMP_SCHEDULER_H