Convert enable_plugins to a buildflag header.

chrome/common/chrome_content_client.h

 // 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.
 
 #ifndef CHROME_COMMON_CHROME_CONTENT_CLIENT_H_
 #define CHROME_COMMON_CHROME_CONTENT_CLIENT_H_
 
 #include <memory>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/files/file_path.h"
 #include "build/build_config.h"
 #include "chrome/common/origin_trials/chrome_origin_trial_policy.h"
 #include "content/public/common/content_client.h"
+#include "ppapi/features/features.h"
 
-#if defined(ENABLE_PLUGINS)
+#if BUILDFLAG(ENABLE_PLUGINS)
 #include "content/public/common/pepper_plugin_info.h"
 #endif
 
 #include "url/url_util.h"
 
 // Returns the user agent of Chrome.
 std::string GetUserAgent();
 
 class ChromeContentClient : public content::ContentClient {
  public:
@@ skipping 14 matching lines @@
   // pointers for built-in plugins. We avoid linking these plugins into
   // chrome_common because then on Windows we would ship them twice because of
   // the split DLL.
 #if !defined(DISABLE_NACL)
   static void SetNaClEntryFunctions(
       content::PepperPluginInfo::GetInterfaceFunc get_interface,
       content::PepperPluginInfo::PPP_InitializeModuleFunc initialize_module,
       content::PepperPluginInfo::PPP_ShutdownModuleFunc shutdown_module);
 #endif
 
-#if defined(ENABLE_PLUGINS)
+#if BUILDFLAG(ENABLE_PLUGINS)
   static void SetPDFEntryFunctions(
       content::PepperPluginInfo::GetInterfaceFunc get_interface,
       content::PepperPluginInfo::PPP_InitializeModuleFunc initialize_module,
       content::PepperPluginInfo::PPP_ShutdownModuleFunc shutdown_module);
 
   // This returns the most recent plugin based on the plugin versions. In the
   // event of a tie, a debug plugin will be considered more recent than a
   // non-debug plugin.
   // It does not make sense to call this on a vector that contains more than one
   // plugin type. This function may return a nullptr if given an empty vector.
@@ skipping 40 matching lines @@
 
 #if defined(OS_ANDROID)
   media::MediaClientAndroid* GetMediaClientAndroid() override;
 #endif  // OS_ANDROID
 
  private:
   std::unique_ptr<ChromeOriginTrialPolicy> origin_trial_policy_;
 };
 
 #endif  // CHROME_COMMON_CHROME_CONTENT_CLIENT_H_