Add a presubmit check for absl/memory/memory.h inclusion for WrapUnique

This fixes a build error on C++17 mode due to missing #include, plus
adds a presubmit check to prevent further breakage.

Bug: chromium:752720
Change-Id: I5c7d1dca0079dfe7a042650402e6f7ae28a797ba
Reviewed-on: https://webrtc-review.googlesource.com/c/124940
Commit-Queue: Taiju Tsuiki <tzik@chromium.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#26898}

PRESUBMIT.py

@@ -955,15 +955,16 @@ def CheckAbslMemoryInclude(input_api, output_api, source_file_filter):
     if pattern.search(contents):
       continue
     for _, line in f.ChangedContents():
-      if 'absl::make_unique' in line:
+      if 'absl::make_unique' in line or 'absl::WrapUnique' in line:
         files.append(f)
         break
 
   if len(files):
     return [output_api.PresubmitError(
         'Please include "absl/memory/memory.h" header for'
-        ' absl::make_unique.\nThis header may or may not be included'
-        ' transitively depends on the C++ standard version.',
+        ' absl::make_unique or absl::WrapUnique.\nThis header may or'
+        ' may not be included transitively depending on the C++ standard'
+        ' version.',
         files)]
   return []
 

logging/rtc_event_log/events/rtc_event_generic_packet_received.cc

@@ -10,6 +10,8 @@
 
 #include "logging/rtc_event_log/events/rtc_event_generic_packet_received.h"
 
+#include "absl/memory/memory.h"
+
 namespace webrtc {
 
 RtcEventGenericPacketReceived::RtcEventGenericPacketReceived(

logging/rtc_event_log/events/rtc_event_generic_packet_sent.cc

@@ -10,6 +10,8 @@
 
 #include "logging/rtc_event_log/events/rtc_event_generic_packet_sent.h"
 
+#include "absl/memory/memory.h"
+
 namespace webrtc {
 
 RtcEventGenericPacketSent::RtcEventGenericPacketSent(int64_t packet_number,