[tracing] Mechanical rename of LevelOfDetail enum to enum class.

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 f9ba3ae5a134b23dcef8cfcb99a9e24a9e25fb44..f5e2a4ad604427615c6c7c99bb56cf0f401a3a8b 100644
--- a/base/trace_event/memory_dump_manager.cc
+++ b/base/trace_event/memory_dump_manager.cc
@@ -316,7 +316,7 @@ void MemoryDumpManager::ContinueAsyncProcessDump(
   // MemoryDumpType to get request for light / heavy dump, and remove this
   // constant.
   if (!skip_dump) {
-    MemoryDumpArgs dump_args = {MemoryDumpArgs::LEVEL_OF_DETAIL_HIGH};
+    MemoryDumpArgs dump_args = {MemoryDumpArgs::LevelOfDetail::HIGH};
     dump_successful =
         mdp->OnMemoryDump(dump_args, &pmd_async_state->process_memory_dump);
   }