Revert "unique_ptr-ify ownership of ASTConsumers"

This reverts commit r213307.

Reverting to have some on-list discussion/confirmation about the ongoing
direction of smart pointer usage in the LLVM project.

llvm-svn: 213325
diff --git a/clang/lib/CodeGen/CodeGenAction.cpp b/clang/lib/CodeGen/CodeGenAction.cpp
index 0c94949..559c2ef 100644
--- a/clang/lib/CodeGen/CodeGenAction.cpp
+++ b/clang/lib/CodeGen/CodeGenAction.cpp
@@ -590,8 +590,8 @@
   llvm_unreachable("Invalid action!");
 }
 
-std::unique_ptr<ASTConsumer>
-CodeGenAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
+ASTConsumer *CodeGenAction::CreateASTConsumer(CompilerInstance &CI,
+                                              StringRef InFile) {
   BackendAction BA = static_cast<BackendAction>(Act);
   std::unique_ptr<raw_ostream> OS(GetOutputStream(CI, InFile, BA));
   if (BA != Backend_EmitNothing && !OS)
@@ -623,12 +623,11 @@
     LinkModuleToUse = ModuleOrErr.get();
   }
 
-  auto Result = llvm::make_unique<BackendConsumer>(
-      BA, CI.getDiagnostics(), CI.getCodeGenOpts(), CI.getTargetOpts(),
-      CI.getLangOpts(), (bool)CI.getFrontendOpts().ShowTimers, InFile,
-      LinkModuleToUse, OS.release(), *VMContext);
-  BEConsumer = Result.get();
-  return std::move(Result);
+  BEConsumer = new BackendConsumer(BA, CI.getDiagnostics(), CI.getCodeGenOpts(),
+                                   CI.getTargetOpts(), CI.getLangOpts(),
+                                   CI.getFrontendOpts().ShowTimers, InFile,
+                                   LinkModuleToUse, OS.release(), *VMContext);
+  return BEConsumer;
 }
 
 void CodeGenAction::ExecuteAction() {