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/rtc_base/virtual_socket_unittest.cc b/rtc_base/virtual_socket_unittest.cc
index 94def0d..8115c23 100644
--- a/rtc_base/virtual_socket_unittest.cc
+++ b/rtc_base/virtual_socket_unittest.cc
@@ -57,7 +57,7 @@
 struct Sender : public MessageHandler {
   Sender(Thread* th, AsyncSocket* s, uint32_t rt)
       : thread(th),
-        socket(absl::make_unique<AsyncUDPSocket>(s)),
+        socket(std::make_unique<AsyncUDPSocket>(s)),
         done(false),
         rate(rt),
         count(0) {
@@ -103,7 +103,7 @@
 struct Receiver : public MessageHandler, public sigslot::has_slots<> {
   Receiver(Thread* th, AsyncSocket* s, uint32_t bw)
       : thread(th),
-        socket(absl::make_unique<AsyncUDPSocket>(s)),
+        socket(std::make_unique<AsyncUDPSocket>(s)),
         bandwidth(bw),
         done(false),
         count(0),
@@ -201,8 +201,8 @@
     socket->Bind(EmptySocketAddressWithFamily(default_route.family()));
     SocketAddress client1_any_addr = socket->GetLocalAddress();
     EXPECT_TRUE(client1_any_addr.IsAnyIP());
-    auto client1 = absl::make_unique<TestClient>(
-        absl::make_unique<AsyncUDPSocket>(socket), &fake_clock_);
+    auto client1 = std::make_unique<TestClient>(
+        std::make_unique<AsyncUDPSocket>(socket), &fake_clock_);
 
     // Create client2 bound to the default route.
     AsyncSocket* socket2 =
@@ -210,8 +210,8 @@
     socket2->Bind(SocketAddress(default_route, 0));
     SocketAddress client2_addr = socket2->GetLocalAddress();
     EXPECT_FALSE(client2_addr.IsAnyIP());
-    auto client2 = absl::make_unique<TestClient>(
-        absl::make_unique<AsyncUDPSocket>(socket2), &fake_clock_);
+    auto client2 = std::make_unique<TestClient>(
+        std::make_unique<AsyncUDPSocket>(socket2), &fake_clock_);
 
     // Client1 sends to client2, client2 should see the default route as
     // client1's address.
@@ -234,12 +234,12 @@
     // Make sure VSS didn't switch families on us.
     EXPECT_EQ(server_addr.family(), initial_addr.family());
 
-    auto client1 = absl::make_unique<TestClient>(
-        absl::make_unique<AsyncUDPSocket>(socket), &fake_clock_);
+    auto client1 = std::make_unique<TestClient>(
+        std::make_unique<AsyncUDPSocket>(socket), &fake_clock_);
     AsyncSocket* socket2 =
         ss_.CreateAsyncSocket(initial_addr.family(), SOCK_DGRAM);
-    auto client2 = absl::make_unique<TestClient>(
-        absl::make_unique<AsyncUDPSocket>(socket2), &fake_clock_);
+    auto client2 = std::make_unique<TestClient>(
+        std::make_unique<AsyncUDPSocket>(socket2), &fake_clock_);
 
     SocketAddress client2_addr;
     EXPECT_EQ(3, client2->SendTo("foo", 3, server_addr));
@@ -252,7 +252,7 @@
 
     SocketAddress empty = EmptySocketAddressWithFamily(initial_addr.family());
     for (int i = 0; i < 10; i++) {
-      client2 = absl::make_unique<TestClient>(
+      client2 = std::make_unique<TestClient>(
           absl::WrapUnique(AsyncUDPSocket::Create(&ss_, empty)), &fake_clock_);
 
       SocketAddress next_client2_addr;
@@ -838,13 +838,13 @@
     AsyncSocket* socket = ss_.CreateAsyncSocket(AF_INET, SOCK_DGRAM);
     socket->Bind(server_addr);
     SocketAddress bound_server_addr = socket->GetLocalAddress();
-    auto client1 = absl::make_unique<TestClient>(
-        absl::make_unique<AsyncUDPSocket>(socket), &fake_clock_);
+    auto client1 = std::make_unique<TestClient>(
+        std::make_unique<AsyncUDPSocket>(socket), &fake_clock_);
 
     AsyncSocket* socket2 = ss_.CreateAsyncSocket(AF_INET, SOCK_DGRAM);
     socket2->Bind(client_addr);
-    auto client2 = absl::make_unique<TestClient>(
-        absl::make_unique<AsyncUDPSocket>(socket2), &fake_clock_);
+    auto client2 = std::make_unique<TestClient>(
+        std::make_unique<AsyncUDPSocket>(socket2), &fake_clock_);
     SocketAddress client2_addr;
 
     if (shouldSucceed) {
@@ -1049,8 +1049,8 @@
       ss_.CreateAsyncSocket(kIPv4AnyAddress.family(), SOCK_DGRAM));
   socket1->Bind(kIPv4AnyAddress);
   socket2->Bind(kIPv4AnyAddress);
-  auto client1 = absl::make_unique<TestClient>(
-      absl::make_unique<AsyncUDPSocket>(socket1), &fake_clock_);
+  auto client1 = std::make_unique<TestClient>(
+      std::make_unique<AsyncUDPSocket>(socket1), &fake_clock_);
 
   ss_.SetSendingBlocked(true);
   EXPECT_EQ(-1, client1->SendTo("foo", 3, socket2->GetLocalAddress()));