Export RenderWidgetHostViewAura and sensors::Provider to fix component build.

content/browser/renderer_host/render_widget_host_view_aura.h

 // Copyright (c) 2011 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_AURA_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_AURA_H_
 #pragma once
 
 #include <map>
 
 #include "content/browser/renderer_host/render_widget_host_view.h"
+#include "content/common/content_export.h"
 #include "ui/aura/window_delegate.h"
 #include "ui/gfx/compositor/compositor_observer.h"
 #include "webkit/glue/webcursor.h"
 
 namespace WebKit {
 class WebTouchEvent;
 }
 
 #if defined(UI_COMPOSITOR_IMAGE_TRANSPORT)
 class AcceleratedSurfaceContainerLinux;
 #endif
 
-class RenderWidgetHostViewAura : public RenderWidgetHostView,
+class CONTENT_EXPORT RenderWidgetHostViewAura : public RenderWidgetHostView,
 #if defined(UI_COMPOSITOR_IMAGE_TRANSPORT)
-                                 public ui::CompositorObserver,
+                                                public ui::CompositorObserver,
 #endif
-                                 public aura::WindowDelegate {
+                                                public aura::WindowDelegate {
  public:
   explicit RenderWidgetHostViewAura(RenderWidgetHost* host);
   virtual ~RenderWidgetHostViewAura();
 
   // TODO(derat): Add an abstract RenderWidgetHostView::InitAsChild() method and
   // update callers: http://crbug.com/102450.
   void InitAsChild();
 
   // Overridden from RenderWidgetHostView:
   virtual void InitAsPopup(RenderWidgetHostView* parent_host_view,
@@ skipping 121 matching lines @@
   std::map<uint64, scoped_refptr<AcceleratedSurfaceContainerLinux> >
       accelerated_surface_containers_;
 #endif
 
   bool skip_schedule_paint_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewAura);
 };
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_AURA_H_