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/output_stream_test.cc b/compiler/output_stream_test.cc
index 290bf25..5fa0ccb 100644
--- a/compiler/output_stream_test.cc
+++ b/compiler/output_stream_test.cc
@@ -64,7 +64,7 @@
   FileOutputStream output_stream(tmp.GetFile());
   SetOutputStream(output_stream);
   GenerateTestOutput();
-  UniquePtr<File> in(OS::OpenFileForReading(tmp.GetFilename().c_str()));
+  std::unique_ptr<File> in(OS::OpenFileForReading(tmp.GetFilename().c_str()));
   EXPECT_TRUE(in.get() != NULL);
   std::vector<uint8_t> actual(in->GetLength());
   bool readSuccess = in->ReadFully(&actual[0], actual.size());
@@ -74,12 +74,12 @@
 
 TEST_F(OutputStreamTest, Buffered) {
   ScratchFile tmp;
-  UniquePtr<FileOutputStream> file_output_stream(new FileOutputStream(tmp.GetFile()));
+  std::unique_ptr<FileOutputStream> file_output_stream(new FileOutputStream(tmp.GetFile()));
   CHECK(file_output_stream.get() != NULL);
   BufferedOutputStream buffered_output_stream(file_output_stream.release());
   SetOutputStream(buffered_output_stream);
   GenerateTestOutput();
-  UniquePtr<File> in(OS::OpenFileForReading(tmp.GetFilename().c_str()));
+  std::unique_ptr<File> in(OS::OpenFileForReading(tmp.GetFilename().c_str()));
   EXPECT_TRUE(in.get() != NULL);
   std::vector<uint8_t> actual(in->GetLength());
   bool readSuccess = in->ReadFully(&actual[0], actual.size());