Convert enable_plugins to a buildflag header.

chrome/browser/metrics/chrome_stability_metrics_provider.cc

 // Copyright 2014 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/metrics/chrome_stability_metrics_provider.h"
 
 #include <vector>
 
 #include "base/logging.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/metrics/sparse_histogram.h"
 #include "build/build_config.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "content/public/browser/child_process_data.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/render_process_host.h"
 #include "extensions/features/features.h"
+#include "ppapi/features/features.h"
 
 #if BUILDFLAG(ENABLE_EXTENSIONS)
 #include "extensions/browser/process_map.h"
 #endif
 
-#if defined(ENABLE_PLUGINS)
+#if BUILDFLAG(ENABLE_PLUGINS)
 #include "chrome/browser/metrics/plugin_metrics_provider.h"
 #endif
 
 #if defined(OS_WIN)
 #include <windows.h>  // Needed for STATUS_* codes
 #include "chrome/common/metrics_constants_util_win.h"
 #endif
 
 ChromeStabilityMetricsProvider::ChromeStabilityMetricsProvider(
     PrefService* local_state)
@@ skipping 81 matching lines @@
 
     default:
       NOTREACHED();
       break;
   }
 }
 
 void ChromeStabilityMetricsProvider::BrowserChildProcessCrashed(
     const content::ChildProcessData& data,
     int exit_code) {
-#if defined(ENABLE_PLUGINS)
+#if BUILDFLAG(ENABLE_PLUGINS)
   // Exclude plugin crashes from the count below because we report them via
   // a separate UMA metric.
   if (PluginMetricsProvider::IsPluginProcess(data.process_type))
     return;
 #endif
 
   helper_.BrowserChildProcessCrashed();
 }