prune down content_dll change to just the CONTENT_EXPORTS

content/browser/net/browser_online_state_observer.h

Index: content/browser/net/browser_online_state_observer.h
diff --git a/content/browser/net/browser_online_state_observer.h b/content/browser/net/browser_online_state_observer.h
index 1e5e71a2f2edb619f64e67101439c9f1d9391cbc..9a5b62b46f11fd8776cbc78b1f0492b77e9e56be 100644
--- a/content/browser/net/browser_online_state_observer.h
+++ b/content/browser/net/browser_online_state_observer.h
@@ -7,11 +7,12 @@
 #pragma once
 
 #include "base/basictypes.h"
+#include "content/common/content_export.h"
 #include "net/base/network_change_notifier.h"
 
 // Listens for changes to the online state and manages sending
 // updates to each RenderProcess via RenderProcessHost IPC.
-class BrowserOnlineStateObserver
+class CONTENT_EXPORT BrowserOnlineStateObserver
     : public net::NetworkChangeNotifier::OnlineStateObserver {
  public:
   BrowserOnlineStateObserver();