Update all unique/shared_ptr instances to be qualified with namespace std (#4638)

Summary:
Ran the following commands to recursively change all the files under RocksDB:
```
find . -type f -name "*.cc" -exec sed -i 's/ unique_ptr/ std::unique_ptr/g' {} +
find . -type f -name "*.cc" -exec sed -i 's/<unique_ptr/<std::unique_ptr/g' {} +
find . -type f -name "*.cc" -exec sed -i 's/ shared_ptr/ std::shared_ptr/g' {} +
find . -type f -name "*.cc" -exec sed -i 's/<shared_ptr/<std::shared_ptr/g' {} +
```
Running `make format` updated some formatting on the files touched.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/4638

Differential Revision: D12934992

Pulled By: sagar0

fbshipit-source-id: 45a15d23c230cdd64c08f9c0243e5183934338a8

1 files changed, 2 insertions, 2 deletions

diff --git a/utilities/column_aware_encoding_exp.cc b/utilities/column_aware_encoding_exp.cc
index 988a59b3c..c251c985e 100644
--- a/utilities/column_aware_encoding_exp.cc
+++ b/utilities/column_aware_encoding_exp.cc
@@ -88,7 +88,7 @@ class ColumnAwareEncodingExp {
     EnvOptions env_options;
     if (CompressionTypeSupported(compression_type)) {
       fprintf(stdout, "[%s]\n", FLAGS_compression_type.c_str());
-      unique_ptr<WritableFile> encoded_out_file;
+      std::unique_ptr<WritableFile> encoded_out_file;
 
       std::unique_ptr<Env> env(NewMemEnv(Env::Default()));
       if (!FLAGS_encoded_file.empty()) {
@@ -116,7 +116,7 @@ class ColumnAwareEncodingExp {
       uint64_t encode_time = sw.ElapsedNanosSafe(false /* reset */);
       fprintf(stdout, "Encode time: %" PRIu64 "\n", encode_time);
       if (decode) {
-        unique_ptr<WritableFile> decoded_out_file;
+        std::unique_ptr<WritableFile> decoded_out_file;
         if (!FLAGS_decoded_file.empty()) {
           env->NewWritableFile(FLAGS_decoded_file, &decoded_out_file,
                                env_options);