[llvm] Migrate llvm::make_unique to std::make_unique

Now that we've moved to C++14, we no longer need the llvm::make_unique
implementation from STLExtras.h. This patch is a mechanical replacement
of (hopefully) all the llvm::make_unique instances across the monorepo.

llvm-svn: 369013
diff --git a/llvm/lib/Remarks/RemarkSerializer.cpp b/llvm/lib/Remarks/RemarkSerializer.cpp
index 0d5acbe..caba7bb 100644
--- a/llvm/lib/Remarks/RemarkSerializer.cpp
+++ b/llvm/lib/Remarks/RemarkSerializer.cpp
@@ -25,11 +25,11 @@
     return createStringError(std::errc::invalid_argument,
                              "Unknown remark serializer format.");
   case Format::YAML:
-    return llvm::make_unique<YAMLRemarkSerializer>(OS, Mode);
+    return std::make_unique<YAMLRemarkSerializer>(OS, Mode);
   case Format::YAMLStrTab:
-    return llvm::make_unique<YAMLStrTabRemarkSerializer>(OS, Mode);
+    return std::make_unique<YAMLStrTabRemarkSerializer>(OS, Mode);
   case Format::Bitstream:
-    return llvm::make_unique<BitstreamRemarkSerializer>(OS, Mode);
+    return std::make_unique<BitstreamRemarkSerializer>(OS, Mode);
   }
   llvm_unreachable("Unknown remarks::Format enum");
 }
@@ -46,10 +46,10 @@
                              "Unable to use a string table with the yaml "
                              "format. Use 'yaml-strtab' instead.");
   case Format::YAMLStrTab:
-    return llvm::make_unique<YAMLStrTabRemarkSerializer>(OS, Mode,
+    return std::make_unique<YAMLStrTabRemarkSerializer>(OS, Mode,
                                                          std::move(StrTab));
   case Format::Bitstream:
-    return llvm::make_unique<BitstreamRemarkSerializer>(OS, Mode,
+    return std::make_unique<BitstreamRemarkSerializer>(OS, Mode,
                                                         std::move(StrTab));
   }
   llvm_unreachable("Unknown remarks::Format enum");