Remove VISIBILITY_HIDDEN from class/struct found inside anonymous namespaces.
Chris claims we should never have visibility_hidden inside any .cpp file but
that's still not true even after this commit.

llvm-svn: 85042
diff --git a/llvm/lib/Transforms/Utils/BasicInliner.cpp b/llvm/lib/Transforms/Utils/BasicInliner.cpp
index 4b720b1..b5ffe06 100644
--- a/llvm/lib/Transforms/Utils/BasicInliner.cpp
+++ b/llvm/lib/Transforms/Utils/BasicInliner.cpp
@@ -34,7 +34,7 @@
 
   /// BasicInlinerImpl - BasicInliner implemantation class. This hides
   /// container info, used by basic inliner, from public interface.
-  struct VISIBILITY_HIDDEN BasicInlinerImpl {
+  struct BasicInlinerImpl {
     
     BasicInlinerImpl(const BasicInlinerImpl&); // DO NOT IMPLEMENT
     void operator=(const BasicInlinerImpl&); // DO NO IMPLEMENT