Convert enable_plugins to a buildflag header.

content/renderer/text_input_client_observer.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 CONTENT_RENDERER_TEXT_INPUT_CLIENT_OBSERVER_H_
 #define CONTENT_RENDERER_TEXT_INPUT_CLIENT_OBSERVER_H_
 
 #include "base/macros.h"
 #include "build/build_config.h"
 #include "content/public/renderer/render_view_observer.h"
+#include "ppapi/features/features.h"
 #include "ui/gfx/geometry/point.h"
 #include "ui/gfx/range/range.h"
 
 namespace blink {
 class WebFrameWidget;
 class WebLocalFrame;
 }
 
 namespace content {
 
@@ skipping 13 matching lines @@
 
   // IPC::Sender override.
   bool Send(IPC::Message* message) override;
 
  private:
   // The render widget corresponding to this TextInputClientObserver.
   blink::WebFrameWidget* GetWebFrameWidget() const;
 
   blink::WebLocalFrame* GetFocusedFrame() const;
 
-#if defined(ENABLE_PLUGINS)
+#if BUILDFLAG(ENABLE_PLUGINS)
   // Returns the currently focused pepper plugin on the page. The expectation is
   // that the focused pepper plugin is inside a frame whose local root is equal
   // to GetWebFrameWidget()->localRoot().
   PepperPluginInstanceImpl* GetFocusedPepperPlugin() const;
 #endif
 
   // IPC Message handlers:
   void OnStringAtPoint(gfx::Point point);
   void OnCharacterIndexForPoint(gfx::Point point);
   void OnFirstRectForCharacterRange(gfx::Range range);
   void OnStringForRange(gfx::Range range);
 
   // The RenderWidget owning this instance of the observer.
   RenderWidget* render_widget_;
 
   DISALLOW_COPY_AND_ASSIGN(TextInputClientObserver);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_TEXT_INPUT_CLIENT_OBSERVER_H_