memory-infra: Remove is_enabled_ from MDM

base/trace_event/memory_tracing_observer.cc

Index: base/trace_event/memory_tracing_observer.cc
diff --git a/base/trace_event/memory_tracing_observer.cc b/base/trace_event/memory_tracing_observer.cc
index 3130b205f89c25f70f30c8dd11e0c02558dd3a1c..7e7b7d71409aeb4246dd9fd10fc8303c4327259f 100644
--- a/base/trace_event/memory_tracing_observer.cc
+++ b/base/trace_event/memory_tracing_observer.cc
@@ -16,13 +16,6 @@ const int kTraceEventNumArgs = 1;
 const char* kTraceEventArgNames[] = {"dumps"};
 const unsigned char kTraceEventArgTypes[] = {TRACE_VALUE_TYPE_CONVERTABLE};
 
-bool IsMemoryInfraTracingEnabled() {
-  bool enabled;
-  TRACE_EVENT_CATEGORY_GROUP_ENABLED(MemoryDumpManager::kTraceCategory,
-                                     &enabled);
-  return enabled;
-}
-
 };  // namespace
 
 MemoryTracingObserver::MemoryTracingObserver(
@@ -92,5 +85,12 @@ bool MemoryTracingObserver::AddDumpToTraceIfEnabled(
   return true;
 }
 
+bool MemoryTracingObserver::IsMemoryInfraTracingEnabled() {
+  bool enabled;
+  TRACE_EVENT_CATEGORY_GROUP_ENABLED(MemoryDumpManager::kTraceCategory,
+                                     &enabled);
+  return enabled;
+}
+
 }  // namespace trace_event
 }  // namespace base