Add StateOn{Moderate,Critical}NotificationReceived metrics

content/browser/memory/memory_coordinator.h

 // Copyright 2016 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 CONTENT_BROWSER_MEMORY_MEMORY_COORDINATOR_H_
 #define CONTENT_BROWSER_MEMORY_MEMORY_COORDINATOR_H_
 
 #include "base/memory/memory_coordinator_client_registry.h"
+#include "base/memory/memory_pressure_monitor.h"
 #include "base/process/process_handle.h"
 #include "content/common/content_export.h"
 #include "content/common/memory_coordinator.mojom.h"
 #include "content/public/browser/memory_coordinator_delegate.h"
 #include "mojo/public/cpp/bindings/binding.h"
 
 namespace content {
 
 // NOTE: Memory coordinator is under development and not fully working.
 // TODO(bashi): Add more explanations when we implement memory coordinator V0.
@@ skipping 26 matching lines @@
   // Dispatches a memory state change to the provided process. Returns true if
   // the process is tracked by this coordinator and successfully dispatches,
   // returns false otherwise.
   bool SetMemoryState(
       int render_process_id, mojom::MemoryState memory_state);
 
   // Returns the memory state of the specified render process. Returns UNKNOWN
   // if the process is not tracked by this coordinator.
   mojom::MemoryState GetMemoryState(int render_process_id) const;
 
+  // Records memory pressure notifications. Called by MemoryPressureMonitor.
+  // TODO(bashi): Remove this when MemoryPressureMonitor is retired.
+  void RecordMemoryPressure(
+      base::MemoryPressureMonitor::MemoryPressureLevel level);
+
   // Called when ChildMemoryCoordinator calls AddChild().
   virtual void OnChildAdded(int render_process_id) {}
 
   virtual base::MemoryState GetCurrentMemoryState() const;
   virtual void SetCurrentMemoryStateForTesting(base::MemoryState memory_state);
 
  protected:
   // Constructor. Protected as this is a singleton, but accessible for
   // unittests.
   MemoryCoordinator();
@@ skipping 40 matching lines @@
   ChildInfoMap children_;
 
   std::unique_ptr<MemoryCoordinatorDelegate> delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(MemoryCoordinator);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_MEMORY_MEMORY_COORDINATOR_H_