Enable sharding of AllocationRegister on desktop.

base/trace_event/heap_profiler_allocation_register.cc

Index: base/trace_event/heap_profiler_allocation_register.cc
diff --git a/base/trace_event/heap_profiler_allocation_register.cc b/base/trace_event/heap_profiler_allocation_register.cc
index bd06bd234724ffd88406e422c16bccedc75d9d61..8d2dd769c1d4fd64b4a8394c5d7825bb504c3c60 100644
--- a/base/trace_event/heap_profiler_allocation_register.cc
+++ b/base/trace_event/heap_profiler_allocation_register.cc
@@ -7,8 +7,6 @@
 #include <algorithm>
 #include <limits>
 
-#include "base/trace_event/trace_event_memory_overhead.h"
-
 namespace base {
 namespace trace_event {
 
@@ -152,14 +150,13 @@ AllocationRegister::ConstIterator AllocationRegister::end() const {
   return ConstIterator(*this, AllocationMap::kInvalidKVIndex);
 }
 
-void AllocationRegister::EstimateTraceMemoryOverhead(
-    TraceEventMemoryOverhead* overhead) const {
-  size_t allocated = sizeof(AllocationRegister);
-  size_t resident = sizeof(AllocationRegister) +
-                    allocations_.EstimateUsedMemory() +
-                    backtraces_.EstimateUsedMemory();
-  overhead->Add(TraceEventMemoryOverhead::kHeapProfilerAllocationRegister,
-                allocated, resident);
+size_t AllocationRegister::EstimateAllocatedMemory() const {
+  return sizeof(AllocationRegister);
+}
+
+size_t AllocationRegister::EstimateResidentMemory() const {
+  return sizeof(AllocationRegister) + allocations_.EstimateUsedMemory() +
+         backtraces_.EstimateUsedMemory();
 }
 
 AllocationRegister::BacktraceMap::KVIndex AllocationRegister::InsertBacktrace(