Move OneWriterSeqLock and SharedMemorySeqLockBuffer from content/ to device/base/synchronization

device/BUILD.gn

Index: device/BUILD.gn
diff --git a/device/BUILD.gn b/device/BUILD.gn
index fc54dc77c190a1cf4cbb34b5d7497481c98ae0bc..0d18ce56848fb9b95a76fa99f1990683ab449a48 100644
--- a/device/BUILD.gn
+++ b/device/BUILD.gn
@@ -17,6 +17,7 @@ is_linux_without_udev = is_linux && !use_udev
 
 test("device_unittests") {
   sources = [
+    "base/synchronization/one_writer_seqlock_unittest.cc",
     "battery/battery_status_manager_win_unittest.cc",
     "battery/battery_status_service_unittest.cc",
     "bluetooth/bluetooth_adapter_mac_unittest.mm",
@@ -66,6 +67,8 @@ test("device_unittests") {
 
   deps = [
     "//base/test:test_support",
+    "//base/third_party/dynamic_annotations:dynamic_annotations",
+    "//device/base/synchronization",
     "//device/battery",
     "//device/battery:mojo_bindings",
     "//device/bluetooth",