prune down content_dll change to just the CONTENT_EXPORTS

content/browser/renderer_host/render_view_host_observer.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_VIEW_HOST_OBSERVER_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_OBSERVER_H_
 
 #include "ipc/ipc_channel.h"
+#include "content/common/content_export.h"
 
 class RenderViewHost;
 struct ViewMsg_Navigate_Params;
 
 // An observer API implemented by classes which want to filter IPC messages from
 // RenderViewHost.
-class RenderViewHostObserver : public IPC::Channel::Listener,
-                               public IPC::Message::Sender {
+class CONTENT_EXPORT RenderViewHostObserver : public IPC::Channel::Listener,
+                                              public IPC::Message::Sender {
  public:
 
  protected:
   explicit RenderViewHostObserver(RenderViewHost* render_view_host);
 
   virtual ~RenderViewHostObserver();
 
   // Invoked after the RenderViewHost is created in the renderer process.  After
   // this point, messages can be sent to it (or to observers in the renderer).
   virtual void RenderViewHostInitialized();
@@ skipping 23 matching lines @@
 
   RenderViewHost* render_view_host_;
 
   // The routing ID of the associated RenderViewHost.
   int routing_id_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderViewHostObserver);
 };
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_OBSERVER_H_