Convert enable_plugins to a buildflag header.

content/browser/android/browser_startup_controller.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 "content/browser/android/browser_startup_controller.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "content/browser/android/content_startup_flags.h"
+#include "ppapi/features/features.h"
 
 #include "jni/BrowserStartupController_jni.h"
 
 using base::android::JavaParamRef;
 
 namespace content {
 
 bool BrowserMayStartAsynchronously() {
   JNIEnv* env = base::android::AttachCurrentThread();
   return Java_BrowserStartupController_browserMayStartAsynchonously(env);
@@ skipping 30 matching lines @@
                                 const JavaParamRef<jclass>& clazz) {
 #if defined(OFFICIAL_BUILD)
   return true;
 #else
   return false;
 #endif
 }
 
 static jboolean IsPluginEnabled(JNIEnv* env,
                                 const JavaParamRef<jclass>& clazz) {
-#if defined(ENABLE_PLUGINS)
+#if BUILDFLAG(ENABLE_PLUGINS)
   return true;
 #else
   return false;
 #endif
 }
 
 }  // namespace content