Move class into an anonymous namespace.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132925 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/BranchProbabilityInfo.cpp b/lib/Analysis/BranchProbabilityInfo.cpp
index 812fac0..a2e8960 100644
--- a/lib/Analysis/BranchProbabilityInfo.cpp
+++ b/lib/Analysis/BranchProbabilityInfo.cpp
@@ -25,7 +25,7 @@
 
 char BranchProbabilityInfo::ID = 0;
 
-
+namespace {
 // Please note that BranchProbabilityAnalysis is not a FunctionPass.
 // It is created by BranchProbabilityInfo (which is a FunctionPass), which
 // provides a clear interface. Thanks to that, all heuristics and other
@@ -143,6 +143,7 @@
 
   bool runOnFunction(Function &F);
 };
+} // end anonymous namespace
 
 // Calculate Edge Weights using "Return Heuristics". Predict a successor which
 // leads directly to Return Instruction will not be taken.