[tracing] Non-functional refactor of memory dump arg names

base/trace_event/memory_dump_provider.h

Index: base/trace_event/memory_dump_provider.h
diff --git a/base/trace_event/memory_dump_provider.h b/base/trace_event/memory_dump_provider.h
index 6ab20aa1c543116896450b2bb641fc478c4e8c2a..3b1f13623a7e5367a89c1eb976fdaec12fbf632e 100644
--- a/base/trace_event/memory_dump_provider.h
+++ b/base/trace_event/memory_dump_provider.h
@@ -7,23 +7,17 @@
 
 #include "base/base_export.h"
 #include "base/macros.h"
+#include "base/trace_event/memory_dump_request_args.h"
 
 namespace base {
 namespace trace_event {
 
 class ProcessMemoryDump;
 
-// Contains information about the type of memory dump the MemoryDumpProvider
-// should generate on dump request. This is to control the size of dumps
-// generated.
+// Args passed to OnMemoryDump(). This is to avoid rewriting all the subclasses
+// in the codebase when extending the MemoryDumpProvider API.
 struct MemoryDumpArgs {
-  enum class LevelOfDetail {
-    LOW,
-    HIGH,
-    LAST = HIGH  // For IPC Macros.
-  };
-
-  LevelOfDetail level_of_detail;
+  MemoryDumpLevelOfDetail level_of_detail;
 };
 
 // The contract interface that memory dump providers must implement.