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/Analysis/InstCount.cpp b/llvm/lib/Analysis/InstCount.cpp
index 4cde793..79a519e 100644
--- a/llvm/lib/Analysis/InstCount.cpp
+++ b/llvm/lib/Analysis/InstCount.cpp
@@ -34,8 +34,7 @@
 
 
 namespace {
-  class VISIBILITY_HIDDEN InstCount 
-      : public FunctionPass, public InstVisitor<InstCount> {
+  class InstCount : public FunctionPass, public InstVisitor<InstCount> {
     friend class InstVisitor<InstCount>;
 
     void visitFunction  (Function &F) { ++TotalFuncs; }