Now we have a proper C++ library, use std::unique_ptr.

Also remove the Android.libcxx.mk and other bits of stlport compatibility
mechanics.

Change-Id: Icdf7188ba3c79cdf5617672c1cfd0a68ae596a61
diff --git a/compiler/llvm/llvm_compilation_unit.h b/compiler/llvm/llvm_compilation_unit.h
index 58aa6fd..f11fb6e 100644
--- a/compiler/llvm/llvm_compilation_unit.h
+++ b/compiler/llvm/llvm_compilation_unit.h
@@ -17,6 +17,10 @@
 #ifndef ART_COMPILER_LLVM_LLVM_COMPILATION_UNIT_H_
 #define ART_COMPILER_LLVM_LLVM_COMPILATION_UNIT_H_
 
+#include <memory>
+#include <string>
+#include <vector>
+
 #include "base/logging.h"
 #include "base/mutex.h"
 #include "dex/compiler_internals.h"
@@ -28,10 +32,6 @@
 #include "runtime_support_llvm_func.h"
 #include "safe_map.h"
 
-#include <UniquePtr.h>
-#include <string>
-#include <vector>
-
 namespace art {
   class CompiledMethod;
 }
@@ -106,12 +106,12 @@
   const CompilerLLVM* compiler_llvm_;
   const size_t cunit_id_;
 
-  UniquePtr< ::llvm::LLVMContext> context_;
-  UniquePtr<IRBuilder> irb_;
-  UniquePtr<RuntimeSupportBuilder> runtime_support_;
+  std::unique_ptr< ::llvm::LLVMContext> context_;
+  std::unique_ptr<IRBuilder> irb_;
+  std::unique_ptr<RuntimeSupportBuilder> runtime_support_;
   ::llvm::Module* module_;  // Managed by context_
-  UniquePtr<IntrinsicHelper> intrinsic_helper_;
-  UniquePtr<LLVMInfo> llvm_info_;
+  std::unique_ptr<IntrinsicHelper> intrinsic_helper_;
+  std::unique_ptr<LLVMInfo> llvm_info_;
   CompilerDriver* driver_;
   DexCompilationUnit* dex_compilation_unit_;