memory-infra: Remove is_enabled_ from MDM

base/trace_event/memory_tracing_observer.cc

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/trace_event/memory_tracing_observer.h"
 
 #include "base/trace_event/memory_dump_manager.h"
 #include "base/trace_event/trace_event_argument.h"
 
 namespace base {
 namespace trace_event {
 
 namespace {
 
 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(
     TraceLog* trace_log,
     MemoryDumpManager* memory_dump_manager)
     : memory_dump_manager_(memory_dump_manager), trace_log_(trace_log) {
   // If tracing was enabled before initializing MemoryDumpManager, we missed the
   // OnTraceLogEnabled() event. Synthetize it so we can late-join the party.
   // IsEnabled is called before adding observer to avoid calling
   // OnTraceLogEnabled twice.
@@ skipping 49 matching lines @@
   TRACE_EVENT_API_ADD_TRACE_EVENT_WITH_PROCESS_ID(
       TRACE_EVENT_PHASE_MEMORY_DUMP,
       TraceLog::GetCategoryGroupEnabled(MemoryDumpManager::kTraceCategory),
       event_name, trace_event_internal::kGlobalScope, dump_guid, pid,
       kTraceEventNumArgs, kTraceEventArgNames, kTraceEventArgTypes,
       nullptr /* arg_values */, &event_value, TRACE_EVENT_FLAG_HAS_ID);
 
   return true;
 }
 
+bool MemoryTracingObserver::IsMemoryInfraTracingEnabled() {
+  bool enabled;
+  TRACE_EVENT_CATEGORY_GROUP_ENABLED(MemoryDumpManager::kTraceCategory,
+                                     &enabled);
+  return enabled;
+}
+
 }  // namespace trace_event
 }  // namespace base