Remove auto raw pointer deduction from non-linux specific code.

components/metrics/leak_detector/protobuf_to_mojo_converter.cc

Index: components/metrics/leak_detector/protobuf_to_mojo_converter.cc
diff --git a/components/metrics/leak_detector/protobuf_to_mojo_converter.cc b/components/metrics/leak_detector/protobuf_to_mojo_converter.cc
index 8d185678864942339f16d0e2afe22c4230ab63e1..bd827386389c80283f9833e0c25cf351e61299fd 100644
--- a/components/metrics/leak_detector/protobuf_to_mojo_converter.cc
+++ b/components/metrics/leak_detector/protobuf_to_mojo_converter.cc
@@ -58,7 +58,7 @@ void MojoToReport(const mojom::MemoryLeakReport& mojo_report,
     report->add_call_stack(call_stack_addr);
 
   for (const auto& history_entry : mojo_report.alloc_breakdown_history) {
-    auto proto_entry = report->add_alloc_breakdown_history();
+    auto* proto_entry = report->add_alloc_breakdown_history();
     for (auto count : history_entry->counts_by_size) {
       proto_entry->add_counts_by_size(count);
     }