PartitionAllocMemoryDumpProvider can directly inherit from MemoryDumpProvider

base/trace_event/malloc_dump_provider.cc

 // Copyright 2015 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/malloc_dump_provider.h"
 
 #include <stddef.h>
 
 #include "base/allocator/allocator_extension.h"
 #include "base/allocator/allocator_shim.h"
@@ skipping 174 matching lines @@
         if (args.level_of_detail == MemoryDumpLevelOfDetail::DETAILED) {
           for (const auto& alloc_size : *allocation_register_) {
             AllocationMetrics& metrics = metrics_by_context[alloc_size.context];
             metrics.size += alloc_size.size;
             metrics.count++;
           }
         }
         allocation_register_->EstimateTraceMemoryOverhead(&overhead);
       }
     }  // lock(allocation_register_lock_)
-
-    if (!metrics_by_context.empty()) {
-      std::unique_ptr<TracedValue> heap_dump = ExportHeapDump(
-          metrics_by_context, *pmd->session_state());
-      pmd->AddHeapDump("malloc", std::move(heap_dump));
-    }
-    overhead.DumpInto("tracing/heap_profiler_malloc", pmd);
+    pmd->DumpHeapUsage(metrics_by_context, overhead, "malloc");
   }
   tid_dumping_heap_ = kInvalidThreadId;
 
   return true;
 }
 
 void MallocDumpProvider::OnHeapProfilingEnabled(bool enabled) {
 #if BUILDFLAG(USE_EXPERIMENTAL_ALLOCATOR_SHIM)
   if (enabled) {
     {
@@ skipping 42 matching lines @@
       tid_dumping_heap_ == PlatformThread::CurrentId())
     return;
   AutoLock lock(allocation_register_lock_);
   if (!allocation_register_)
     return;
   allocation_register_->Remove(address);
 }
 
 }  // namespace trace_event
 }  // namespace base