[libFuzzer] small refactoring in the driver; dummy implementation of collect_data_flow; attempt to fix the windows bot

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk/lib/fuzzer@360399 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/FuzzerDataFlowTrace.cpp b/FuzzerDataFlowTrace.cpp
index 50ffa98..466312f 100644
--- a/FuzzerDataFlowTrace.cpp
+++ b/FuzzerDataFlowTrace.cpp
@@ -14,6 +14,7 @@
 
 #include <cstdlib>
 #include <fstream>
+#include <numeric>
 #include <sstream>
 #include <string>
 #include <vector>
@@ -195,5 +196,13 @@
          NumTraceFiles, NumFunctions, NumTracesWithFocusFunction);
 }
 
+int CollectDataFlow(const std::string &DFTBinary, const std::string &DirPath,
+                    const Vector<std::string> &CorpusDirs,
+                    const Vector<std::string> &ExtraSeeds) {
+  Printf("INFO: collecting data flow. DFTBinary: %s DirPath: %s\n",
+         DFTBinary.c_str(), DirPath.c_str());
+  return 0;
+}
+
 }  // namespace fuzzer