Convert enable_plugins to a buildflag header.

content/public/renderer/render_frame.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_RENDERER_RENDER_FRAME_H_
 #define CONTENT_PUBLIC_RENDERER_RENDER_FRAME_H_
 
 #include <stddef.h>
 
 #include <memory>
 
 #include "base/callback_forward.h"
 #include "base/strings/string16.h"
 #include "content/common/content_export.h"
 #include "content/public/common/console_message_level.h"
 #include "ipc/ipc_listener.h"
 #include "ipc/ipc_sender.h"
+#include "ppapi/features/features.h"
 #include "third_party/WebKit/public/platform/WebPageVisibilityState.h"
 #include "third_party/WebKit/public/web/WebNavigationPolicy.h"
 
 namespace blink {
 class WebFrame;
 class WebLocalFrame;
 class WebPlugin;
 class WebURLRequest;
 struct WebPluginParams;
 }
@@ skipping 128 matching lines @@
 
   // Returns the AssociatedInterfaceRegistry this frame can use to expose
   // frame-specific Channel-associated interfaces to the remote RenderFrameHost.
   virtual AssociatedInterfaceRegistry* GetAssociatedInterfaceRegistry() = 0;
 
   // Returns the AssociatedInterfaceProvider this frame can use to access
   // frame-specific Channel-assocaited interfaces from the remote
   // RenderFrameHost.
   virtual AssociatedInterfaceProvider* GetRemoteAssociatedInterfaces() = 0;
 
-#if defined(ENABLE_PLUGINS)
+#if BUILDFLAG(ENABLE_PLUGINS)
   // Registers a plugin that has been marked peripheral. If the origin
   // whitelist is later updated and includes |content_origin|, then
   // |unthrottle_callback| will be called.
   virtual void RegisterPeripheralPlugin(
       const url::Origin& content_origin,
       const base::Closure& unthrottle_callback) = 0;
 
   // Returns the peripheral content heuristic decision.
   //
   // Power Saver is enabled for plugin content that are cross-origin and
@@ skipping 69 matching lines @@
 
  private:
   // This interface should only be implemented inside content.
   friend class RenderFrameImpl;
   RenderFrame() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_RENDERER_RENDER_FRAME_H_