prune down content_dll change to just the CONTENT_EXPORTS

content/renderer/p2p/ipc_network_manager.h

Index: content/renderer/p2p/ipc_network_manager.h
diff --git a/content/renderer/p2p/ipc_network_manager.h b/content/renderer/p2p/ipc_network_manager.h
index 3fa17054b2354f19b911aaf529ec871b52281a10..83d236a759ae0c4e8d6f2ac3bf3686e80b8ede24 100644
--- a/content/renderer/p2p/ipc_network_manager.h
+++ b/content/renderer/p2p/ipc_network_manager.h
@@ -9,6 +9,7 @@
 
 #include "base/task.h"
 #include "base/compiler_specific.h"
+#include "content/common/content_export.h"
 #include "content/renderer/p2p/socket_dispatcher.h"
 #include "net/base/net_util.h"
 #include "third_party/libjingle/source/talk/base/network.h"
@@ -21,7 +22,7 @@ class IpcNetworkManager : public talk_base::NetworkManagerBase,
                           public P2PSocketDispatcher::NetworkListObserver {
  public:
   // Constructor doesn't take ownership of the |socket_dispatcher|.
-  IpcNetworkManager(P2PSocketDispatcher* socket_dispatcher);
+  CONTENT_EXPORT IpcNetworkManager(P2PSocketDispatcher* socket_dispatcher);
   virtual ~IpcNetworkManager();
 
   virtual void StartUpdating() OVERRIDE;