memory-infra: Switch to MemoryPeakDetector and simplify MemoryDumpScheduler

base/trace_event/memory_peak_detector.cc

 // 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.
 
 #include "base/trace_event/memory_peak_detector.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/sys_info.h"
 #include "base/threading/sequenced_task_runner_handle.h"
@@ skipping 100 matching lines @@
   // ReloadDumpProvidersAndStartPollingIfNeeded().
   // Depending on the sandbox model, it is possible that no polling-capable
   // dump providers will be ever available.
   ReloadDumpProvidersAndStartPollingIfNeeded();
 }
 
 void MemoryPeakDetector::StopInternal() {
   DCHECK_NE(NOT_INITIALIZED, state_);
   state_ = DISABLED;
   ++generation_;
+  for (const scoped_refptr<MemoryDumpProviderInfo>& mdp_info : dump_providers_)
+    mdp_info->dump_provider->SuspendFastMemoryPolling();
   dump_providers_.clear();
 }
 
 void MemoryPeakDetector::TearDownInternal() {
   StopInternal();
   get_dump_providers_function_.Reset();
   on_peak_detected_callback_.Reset();
   state_ = NOT_INITIALIZED;
 }
 
@@ skipping 118 matching lines @@
         config_.polling_interval_ms;
   }
 }
 
 void MemoryPeakDetector::SetStaticThresholdForTesting(
     uint64_t static_threshold_bytes) {
   DCHECK_EQ(DISABLED, state_);
   static_threshold_bytes_ = static_threshold_bytes;
 }
 
+MemoryPeakDetector::MemoryPeakDetector::Config::Config()
+    : Config(0, 0, false) {}
+
+MemoryPeakDetector::MemoryPeakDetector::Config::Config(
+    uint32_t polling_interval_ms,
+    uint32_t min_time_between_peaks_ms,
+    bool enable_verbose_poll_tracing)
+    : polling_interval_ms(polling_interval_ms),
+      min_time_between_peaks_ms(min_time_between_peaks_ms),
+      enable_verbose_poll_tracing(enable_verbose_poll_tracing) {}
+
 }  // namespace trace_event
 }  // namespace base