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/VMCore/PrintModulePass.cpp b/llvm/lib/VMCore/PrintModulePass.cpp
index 0a7f449..52a791b 100644
--- a/llvm/lib/VMCore/PrintModulePass.cpp
+++ b/llvm/lib/VMCore/PrintModulePass.cpp
@@ -22,7 +22,7 @@
 
 namespace {
 
-  class VISIBILITY_HIDDEN PrintModulePass : public ModulePass {
+  class PrintModulePass : public ModulePass {
     raw_ostream *Out;       // raw_ostream to print on
     bool DeleteStream;      // Delete the ostream in our dtor?
   public: