Move enable extensions define to a build flag.

chrome/browser/performance_monitor/performance_monitor.cc

 // Copyright (c) 2012 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 "chrome/browser/performance_monitor/performance_monitor.h"
 
 #include <stddef.h>
 #include <utility>
 
 #include "base/memory/ptr_util.h"
 #include "base/process/process_iterator.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/time/time.h"
 #include "content/public/browser/browser_child_process_host.h"
 #include "content/public/browser/browser_child_process_host_iterator.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/child_process_data.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/common/content_constants.h"
+#include "extensions/features/features.h"
 
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
 #include "extensions/browser/extension_host.h"
 #include "extensions/browser/extension_registry.h"
 #include "extensions/common/manifest_handlers/background_info.h"
 #endif
 
 using content::BrowserThread;
 
 namespace performance_monitor {
 
 namespace {
 
 // The default interval at which PerformanceMonitor performs its timed
 // collections.
 const int kGatherIntervalInSeconds = 120;
 
 base::LazyInstance<PerformanceMonitor> g_monitor = LAZY_INSTANCE_INITIALIZER;
 
 void GatherMetricsForRenderProcess(content::RenderProcessHost* host,
                                    ProcessMetricsMetadata* data) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
   content::BrowserContext* browser_context = host->GetBrowserContext();
   extensions::ProcessMap* extension_process_map =
       extensions::ProcessMap::Get(browser_context);
 
   std::set<std::string> extension_ids =
       extension_process_map->GetExtensionsInProcess(host->GetID());
 
   // We only collect more granular metrics when there's only one extension
   // running in a given renderer, to reduce noise.
   if (extension_ids.size() != 1)
@@ skipping 153 matching lines @@
 
 void PerformanceMonitor::RunTriggersUIThread() {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   for (auto& metrics : metrics_map_)
     metrics.second->RunPerformanceTriggers();
 
   StartGatherCycle();
 }
 
 }  // namespace performance_monitor