Revert name change from r132533.  Lower case naming was intended per style guidelines.

llvm-svn: 132555
diff --git a/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp b/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
index 2ec10c0..6972a45 100644
--- a/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
+++ b/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
@@ -1205,7 +1205,7 @@
 static void WriteFunction(const Function &F, ValueEnumerator &VE,
                           BitstreamWriter &Stream) {
   Stream.EnterSubblock(bitc::FUNCTION_BLOCK_ID, 4);
-  VE.IncorporateFunction(F);
+  VE.incorporateFunction(F);
 
   SmallVector<unsigned, 64> Vals;
 
@@ -1269,7 +1269,7 @@
 
   if (NeedsMetadataAttachment)
     WriteMetadataAttachment(F, VE, Stream);
-  VE.PurgeFunction();
+  VE.purgeFunction();
   Stream.ExitBlock();
 }