prune down content_dll change to just the CONTENT_EXPORTS

content/common/child_process.h

Index: content/common/child_process.h
diff --git a/content/common/child_process.h b/content/common/child_process.h
index e3786aea540edbf2fbe50c01b963c01aa44bca07..53b77a5959e6ce778fce243b7a4bb60b3a8a3683 100644
--- a/content/common/child_process.h
+++ b/content/common/child_process.h
@@ -10,12 +10,13 @@
 #include "base/memory/scoped_ptr.h"
 #include "base/threading/thread.h"
 #include "base/synchronization/waitable_event.h"
+#include "content/common/content_export.h"
 
 class ChildThread;
 
 // Base class for child processes of the browser process (i.e. renderer and
 // plugin host). This is a singleton object for each child process.
-class ChildProcess {
+class CONTENT_EXPORT ChildProcess {
  public:
   // Child processes should have an object that derives from this class.
   // Normally you would immediately call set_main_thread after construction.