Add missing #include and deps to absl/memory

These files uses absl::WrapUnique or absl::make_unique without including
absl/memory/memory.h. They used to include it indirectly via some other
headers, but in C++17 mode, we need to include it explicitly.

Bug: chromium:752720
Change-Id: Ic9a85a4844a71f8b8786c071f18d5b9cc301c26b
Reviewed-on: https://webrtc-review.googlesource.com/c/105880
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Yves Gerey <yvesg@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Commit-Queue: Taiju Tsuiki <tzik@chromium.org>
Cr-Commit-Position: refs/heads/master@{#25192}

api/BUILD.gn

@@ -169,6 +169,7 @@ rtc_source_set("test_dependency_factory") {
   deps = [
     ":video_quality_test_fixture_api",
     "../rtc_base:thread_checker",
+    "//third_party/abseil-cpp/absl/memory",
   ]
   if (!build_with_chromium && is_clang) {
     # Suppress warnings from the Chromium Clang plugin (bugs.webrtc.org/163).

api/test/test_dependency_factory.cc

@@ -11,6 +11,7 @@
 #include <memory>
 #include <utility>
 
+#include "absl/memory/memory.h"
 #include "api/test/test_dependency_factory.h"
 #include "rtc_base/thread_checker.h"
 

p2p/base/relayport.h

@@ -17,6 +17,7 @@
 #include <utility>
 #include <vector>
 
+#include "absl/memory/memory.h"
 #include "p2p/base/port.h"
 #include "p2p/base/stunrequest.h"
 

p2p/base/stunport.h

@@ -15,6 +15,7 @@
 #include <memory>
 #include <string>
 
+#include "absl/memory/memory.h"
 #include "p2p/base/port.h"
 #include "p2p/base/stunrequest.h"
 #include "rtc_base/asyncpacketsocket.h"

p2p/base/tcpport.h

@@ -15,6 +15,7 @@
 #include <memory>
 #include <string>
 
+#include "absl/memory/memory.h"
 #include "p2p/base/port.h"
 #include "rtc_base/asyncpacketsocket.h"
 

p2p/base/turnport.h

@@ -19,6 +19,7 @@
 #include <string>
 #include <vector>
 
+#include "absl/memory/memory.h"
 #include "p2p/base/port.h"
 #include "p2p/client/basicportallocator.h"
 #include "rtc_base/asyncinvoker.h"