Leak reports collect information about the last uptrend

components/metrics/leak_detector/leak_detector.mojom

 // 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.
 
 module metrics.mojom;
 
 struct LeakDetectorParams {
   float sampling_rate;
   uint32 max_stack_depth;
   uint64 analysis_interval_bytes;
   uint32 size_suspicion_threshold;
   uint32 call_stack_suspicion_threshold;
 };
 
 struct AllocationBreakdown {
   array<uint32> counts_by_size;
   uint32 count_for_call_stack;
 };
 
 struct MemoryLeakReport {
   uint32 size_bytes;
   array<uint64> call_stack;
+  uint32 num_rising_intervals;
+  uint32 num_allocs_increase;
 
   array<AllocationBreakdown> alloc_breakdown_history;
 };
 
 // Provides a remote interface for enabling LeakDetector on remote processes.
 interface LeakDetector {
   // Returns a LeakDetectorParams struct. Used to indicate to the remote process
   // what parameters to use when initializing LeakDetector. Can also return
   // |params.sampling_rate| == 0 to indicate that LeakDetector should not be
   // initialized on a particular process.
   GetParams() => (LeakDetectorParams params);
 
   // When a remote process running LeakDetector gets some leak reports, it
   // should call this function to return the leak reports back to the main
   // process that implements this function. The reports should be sent back as
   // an array of serialized MemoryLeakReportProtos.
   SendLeakReports(array<MemoryLeakReport> reports);
 };