content: Cleanup class/struct forward declarations

content/browser/frame_host/render_widget_host_view_guest.h

 // Copyright 2014 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_FRAME_HOST_RENDER_WIDGET_HOST_VIEW_GUEST_H_
 #define CONTENT_BROWSER_FRAME_HOST_RENDER_WIDGET_HOST_VIEW_GUEST_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 10 matching lines @@
 #include "ui/events/gestures/gesture_recognizer.h"
 #include "ui/events/gestures/gesture_types.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/geometry/vector2d_f.h"
 #include "ui/gfx/native_widget_types.h"
 
 namespace content {
 class BrowserPluginGuest;
 class RenderWidgetHost;
 class RenderWidgetHostImpl;
-struct NativeWebKeyboardEvent;
 struct TextInputState;
 
 // See comments in render_widget_host_view.h about this class and its members.
 // This version is for the BrowserPlugin which handles a lot of the
 // functionality in a diffent place and isn't platform specific.
 // The BrowserPlugin is currently a special case for out-of-process rendered
 // content and therefore inherits from RenderWidgetHostViewChildFrame.
 // Eventually all RenderWidgetHostViewGuest code will be subsumed by
 // RenderWidgetHostViewChildFrame and this class will be removed.
 //
@@ skipping 118 matching lines @@
   // The platform view for this RenderWidgetHostView.
   // RenderWidgetHostViewGuest mostly only cares about stuff related to
   // compositing, the rest are directly forwarded to this |platform_view_|.
   base::WeakPtr<RenderWidgetHostViewBase> platform_view_;
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewGuest);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_RENDER_WIDGET_HOST_VIEW_GUEST_H_