prune down content_dll change to just the CONTENT_EXPORTS

content/browser/gpu/gpu_data_manager.h

Index: content/browser/gpu/gpu_data_manager.h
diff --git a/content/browser/gpu/gpu_data_manager.h b/content/browser/gpu/gpu_data_manager.h
index a5a40d0b2544d33eb3b38fc079829fd60ac9091d..87d6147447219221a59c7d4d9b860761d41090c5 100644
--- a/content/browser/gpu/gpu_data_manager.h
+++ b/content/browser/gpu/gpu_data_manager.h
@@ -15,13 +15,14 @@
 #include "base/synchronization/lock.h"
 #include "base/task.h"
 #include "base/values.h"
+#include "content/common/content_export.h"
 #include "content/common/gpu/gpu_feature_flags.h"
 #include "content/common/gpu/gpu_info.h"
 
 class CommandLine;
 class GpuBlacklist;
 
-class GpuDataManager {
+class CONTENT_EXPORT GpuDataManager {
  public:
   // Getter for the singleton. This will return NULL on failure.
   static GpuDataManager* GetInstance();