Use std::make_unique instead of absl::make_unique.

WebRTC is now using C++14 so there is no need to use the Abseil version
of std::make_unique.

This CL has been created with the following steps:

git grep -l absl::make_unique | sort | uniq > /tmp/make_unique.txt
git grep -l absl::WrapUnique | sort | uniq > /tmp/wrap_unique.txt
git grep -l "#include <memory>" | sort | uniq > /tmp/memory.txt

diff --new-line-format="" --unchanged-line-format="" \
  /tmp/make_unique.txt /tmp/wrap_unique.txt | sort | \
  uniq > /tmp/only_make_unique.txt
diff --new-line-format="" --unchanged-line-format="" \
  /tmp/only_make_unique.txt /tmp/memory.txt | \
  xargs grep -l "absl/memory" > /tmp/add-memory.txt

git grep -l "\babsl::make_unique\b" | \
  xargs sed -i "s/\babsl::make_unique\b/std::make_unique/g"

git checkout PRESUBMIT.py abseil-in-webrtc.md

cat /tmp/add-memory.txt | \
  xargs sed -i \
  's/#include "absl\/memory\/memory.h"/#include <memory>/g'
git cl format
# Manual fix order of the new inserted #include <memory>

cat /tmp/only_make_unique | xargs grep -l "#include <memory>" | \
  xargs sed -i '/#include "absl\/memory\/memory.h"/d'

git ls-files | grep BUILD.gn | \
  xargs sed -i '/\/\/third_party\/abseil-cpp\/absl\/memory/d'

python tools_webrtc/gn_check_autofix.py \
  -m tryserver.webrtc -b linux_rel

# Repead the gn_check_autofix step for other platforms

git ls-files | grep BUILD.gn | \
  xargs sed -i 's/absl\/memory:memory/absl\/memory/g'
git cl format

Bug: webrtc:10945
Change-Id: I3fe28ea80f4dd3ba3cf28effd151d5e1f19aff89
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/153221
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Alessio Bazzica <alessiob@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#29209}
diff --git a/pc/webrtc_sdp.cc b/pc/webrtc_sdp.cc
index 7fefa40..ad8fb7e 100644
--- a/pc/webrtc_sdp.cc
+++ b/pc/webrtc_sdp.cc
@@ -24,7 +24,6 @@
 #include <vector>
 
 #include "absl/algorithm/container.h"
-#include "absl/memory/memory.h"
 #include "absl/strings/match.h"
 #include "api/candidate.h"
 #include "api/crypto_params.h"
@@ -987,7 +986,7 @@
   TransportDescription session_td("", "");
   RtpHeaderExtensions session_extmaps;
   rtc::SocketAddress session_connection_addr;
-  auto desc = absl::make_unique<cricket::SessionDescription>();
+  auto desc = std::make_unique<cricket::SessionDescription>();
   size_t current_pos = 0;
 
   // Session Description
@@ -2658,7 +2657,7 @@
     TransportDescription* transport,
     std::vector<std::unique_ptr<JsepIceCandidate>>* candidates,
     webrtc::SdpParseError* error) {
-  auto media_desc = absl::make_unique<C>();
+  auto media_desc = std::make_unique<C>();
   if (!ParseContent(message, media_type, mline_index, protocol, payload_types,
                     pos, content_name, bundle_only, msid_signaling,
                     media_desc.get(), transport, candidates, error)) {
@@ -2771,7 +2770,7 @@
         // The draft-26 format is:
         // m=application <port> UDP/DTLS/SCTP webrtc-datachannel
         // use_sctpmap should be false.
-        auto data_desc = absl::make_unique<SctpDataContentDescription>();
+        auto data_desc = std::make_unique<SctpDataContentDescription>();
         // Default max message size is 64K
         // according to draft-ietf-mmusic-sctp-sdp-26
         data_desc->set_max_message_size(kDefaultSctpMaxMessageSize);
@@ -3457,7 +3456,7 @@
     RTC_DCHECK(candidate.password().empty());
     candidate.set_password(transport->ice_pwd);
     candidates->push_back(
-        absl::make_unique<JsepIceCandidate>(mline_id, mline_index, candidate));
+        std::make_unique<JsepIceCandidate>(mline_id, mline_index, candidate));
   }
 
   return true;