Remove a bunch of TOOLKIT_GTK in content/ and gpu/, as well as NPAPI plugins on linux

content/browser/renderer_host/render_widget_host_view_base.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_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_BASE_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_BASE_H_
 
 #if defined(OS_MACOSX)
 #include <OpenGL/OpenGL.h>
 #endif
 
-#if defined(TOOLKIT_GTK)
-#include <gdk/gdk.h>
-#endif
-
 #include <string>
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/callback_forward.h"
 #include "base/timer/timer.h"
 #include "content/common/content_export.h"
 #include "content/port/browser/render_widget_host_view_port.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/range/range.h"
@@ skipping 149 matching lines @@
   uint32 renderer_frame_number_;
 
   base::OneShotTimer<RenderWidgetHostViewBase> flush_input_timer_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewBase);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_BASE_H_