Export some unix-specific content symbols

content/browser/geolocation/gps_location_provider_linux.h

Index: content/browser/geolocation/gps_location_provider_linux.h
diff --git a/content/browser/geolocation/gps_location_provider_linux.h b/content/browser/geolocation/gps_location_provider_linux.h
index bea8eb446506fadbbb718fc74ad50cf2223bd69f..777862086730efb341bfd6c44401a8553ef1f817 100644
--- a/content/browser/geolocation/gps_location_provider_linux.h
+++ b/content/browser/geolocation/gps_location_provider_linux.h
@@ -14,6 +14,7 @@
 #include "base/memory/scoped_ptr.h"
 #include "base/task.h"
 #include "content/browser/geolocation/location_provider.h"
+#include "content/common/content_export.h"
 #include "content/common/geoposition.h"
 
 class LibGps;
@@ -23,7 +24,7 @@ class LibGps;
 // IO thread). As the older libgps API is not designed to support polling,
 // there's a chance it could block, so better move this into its own worker
 // thread.
-class GpsLocationProviderLinux : public LocationProviderBase {
+class CONTENT_EXPORT GpsLocationProviderLinux : public LocationProviderBase {
  public:
   typedef LibGps* (*LibGpsFactory)();
   // |factory| will be used to create the gpsd client library wrapper. (Note