[tracing] Ignore tracing allocations in heap profiler

base/trace_event/memory_dump_manager.cc

Index: base/trace_event/memory_dump_manager.cc
diff --git a/base/trace_event/memory_dump_manager.cc b/base/trace_event/memory_dump_manager.cc
index 53532b231242ff567e07486f680c1819cf6bb092..cd2c8e123fc36d6d6f53ea7531c94e7d513363fd 100644
--- a/base/trace_event/memory_dump_manager.cc
+++ b/base/trace_event/memory_dump_manager.cc
@@ -402,6 +402,7 @@ void MemoryDumpManager::CreateProcessDump(const MemoryDumpRequestArgs& args,
 // (un)registrations of |dump_providers_|.
 void MemoryDumpManager::SetupNextMemoryDump(
     std::unique_ptr<ProcessMemoryDumpAsyncState> pmd_async_state) {
+  SCOPED_HEAP_PROFILER_IGNORE_MALLOC_EVENT;
   // Initalizes the ThreadLocalEventBuffer to guarantee that the TRACE_EVENTs
   // in the PostTask below don't end up registering their own dump providers
   // (for discounting trace memory overhead) while holding the |lock_|.
@@ -474,6 +475,7 @@ void MemoryDumpManager::SetupNextMemoryDump(
 // (unless disabled).
 void MemoryDumpManager::InvokeOnMemoryDump(
     ProcessMemoryDumpAsyncState* owned_pmd_async_state) {
+  SCOPED_HEAP_PROFILER_IGNORE_MALLOC_EVENT;
   // In theory |owned_pmd_async_state| should be a scoped_ptr. The only reason
   // why it isn't is because of the corner case logic of |did_post_task|
   // above, which needs to take back the ownership of the |pmd_async_state| when
@@ -535,6 +537,7 @@ void MemoryDumpManager::InvokeOnMemoryDump(
 // static
 void MemoryDumpManager::FinalizeDumpAndAddToTrace(
     std::unique_ptr<ProcessMemoryDumpAsyncState> pmd_async_state) {
+  SCOPED_HEAP_PROFILER_IGNORE_MALLOC_EVENT;
   DCHECK(pmd_async_state->pending_dump_providers.empty());
   const uint64_t dump_guid = pmd_async_state->req_args.dump_guid;
   if (!pmd_async_state->callback_task_runner->BelongsToCurrentThread()) {