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/Frontend/Rewrite/FrontendActions.cpp b/clang/lib/Frontend/Rewrite/FrontendActions.cpp
index 1b5eb28..59fef73 100644
--- a/clang/lib/Frontend/Rewrite/FrontendActions.cpp
+++ b/clang/lib/Frontend/Rewrite/FrontendActions.cpp
@@ -30,8 +30,8 @@
 // AST Consumer Actions
 //===----------------------------------------------------------------------===//
 
-std::unique_ptr<ASTConsumer>
-HTMLPrintAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
+ASTConsumer *HTMLPrintAction::CreateASTConsumer(CompilerInstance &CI,
+                                                StringRef InFile) {
   if (raw_ostream *OS = CI.createDefaultOutputFile(false, InFile))
     return CreateHTMLPrinter(OS, CI.getPreprocessor());
   return nullptr;
@@ -40,9 +40,9 @@
 FixItAction::FixItAction() {}
 FixItAction::~FixItAction() {}
 
-std::unique_ptr<ASTConsumer>
-FixItAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
-  return llvm::make_unique<ASTConsumer>();
+ASTConsumer *FixItAction::CreateASTConsumer(CompilerInstance &CI,
+                                            StringRef InFile) {
+  return new ASTConsumer();
 }
 
 namespace {
@@ -148,8 +148,8 @@
 
 #ifdef CLANG_ENABLE_OBJC_REWRITER
 
-std::unique_ptr<ASTConsumer>
-RewriteObjCAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
+ASTConsumer *RewriteObjCAction::CreateASTConsumer(CompilerInstance &CI,
+                                                  StringRef InFile) {
   if (raw_ostream *OS = CI.createDefaultOutputFile(false, InFile, "cpp")) {
     if (CI.getLangOpts().ObjCRuntime.isNonFragile())
       return CreateModernObjCRewriter(InFile, OS,