Move enable_webrtc to a buildflag header.

chrome/browser/chrome_browser_field_trials_desktop.cc

 // Copyright 2013 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/chrome_browser_field_trials_desktop.h"
 
 #include <map>
 #include <string>
 
 #include "base/command_line.h"
 #include "base/debug/activity_tracker.h"
 #include "base/feature_list.h"
 #include "base/files/file_util.h"
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/path_service.h"
 #include "chrome/browser/prerender/prerender_field_trial.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_switches.h"
 #include "components/browser_watcher/features.h"
 #include "components/variations/variations_associated_data.h"
 #include "content/public/common/content_switches.h"
+#include "media/media_features.h"
 
 #if defined(OS_WIN)
 #include "components/browser_watcher/stability_debugging_win.h"
 #endif
 
 namespace chrome {
 
 namespace {
 
 void SetupStunProbeTrial() {
-#if defined(ENABLE_WEBRTC)
+#if BUILDFLAG(ENABLE_WEBRTC)
   std::map<std::string, std::string> params;
   if (!variations::GetVariationParams("StunProbeTrial2", &params))
     return;
 
   // The parameter, used by StartStunFieldTrial, should have the following
   // format: "request_per_ip/interval/sharedsocket/batch_size/total_batches/
   // server1:port/server2:port/server3:port/"
   std::string cmd_param = params["request_per_ip"] + "/" + params["interval"] +
                           "/" + params["sharedsocket"] + "/" +
                           params["batch_size"] + "/" + params["total_batches"] +
@@ skipping 63 matching lines @@
 
 void SetupDesktopFieldTrials(const base::CommandLine& parsed_command_line) {
   prerender::ConfigurePrerender(parsed_command_line);
   SetupStunProbeTrial();
 #if defined(OS_WIN)
   SetupStabilityDebugging();
 #endif  // defined(OS_WIN)
 }
 
 }  // namespace chrome