Define calculateDbgStreamSize for consistency.

llvm-svn: 285487
diff --git a/llvm/lib/DebugInfo/PDB/Raw/DbiStreamBuilder.cpp b/llvm/lib/DebugInfo/PDB/Raw/DbiStreamBuilder.cpp
index 829bb3d..8604f98 100644
--- a/llvm/lib/DebugInfo/PDB/Raw/DbiStreamBuilder.cpp
+++ b/llvm/lib/DebugInfo/PDB/Raw/DbiStreamBuilder.cpp
@@ -61,7 +61,7 @@
 uint32_t DbiStreamBuilder::calculateSerializedLength() const {
   // For now we only support serializing the header.
   return sizeof(DbiStreamHeader) + calculateFileInfoSubstreamSize() +
-         calculateModiSubstreamSize() + DbgStreams.size() * sizeof(uint16_t);
+         calculateModiSubstreamSize() + calculateDbgStreamsSize();
 }
 
 Error DbiStreamBuilder::addModuleInfo(StringRef ObjFile, StringRef Module) {
@@ -121,6 +121,10 @@
   return Size;
 }
 
+uint32_t DbiStreamBuilder::calculateDbgStreamsSize() const {
+  return DbgStreams.size() * sizeof(uint16_t);
+}
+
 Error DbiStreamBuilder::generateModiSubstream() {
   uint32_t Size = calculateModiSubstreamSize();
   auto Data = Allocator.Allocate<uint8_t>(Size);