Chromium -> Mojo roll.

base/BUILD.gn

Index: base/BUILD.gn
diff --git a/base/BUILD.gn b/base/BUILD.gn
index f1034466a65dbb033103fd4743edf6b288509322..8b9b5bf19056236ef193fef6e453d7f28959881b 100644
--- a/base/BUILD.gn
+++ b/base/BUILD.gn
@@ -370,6 +370,10 @@ component("base") {
     "profiler/scoped_profile.h",
     "profiler/scoped_tracker.cc",
     "profiler/scoped_tracker.h",
+    "profiler/stack_sampling_profiler.cc",
+    "profiler/stack_sampling_profiler.h",
+    "profiler/stack_sampling_profiler_posix.cc",
+    "profiler/stack_sampling_profiler_win.cc",
     "profiler/tracked_time.cc",
     "profiler/tracked_time.h",
     "rand_util.cc",
@@ -484,6 +488,8 @@ component("base") {
     "threading/non_thread_safe_impl.h",
     "threading/platform_thread.h",
     "threading/platform_thread_android.cc",
+    "threading/platform_thread_internal_posix.cc",
+    "threading/platform_thread_internal_posix.h",
     "threading/platform_thread_linux.cc",
     "threading/platform_thread_mac.mm",
     "threading/platform_thread_posix.cc",
@@ -740,6 +746,7 @@ component("base") {
     sources -= [
       "native_library_posix.cc",
       "strings/sys_string_conversions_posix.cc",
+      "threading/platform_thread_internal_posix.cc",
     ]
   } else {
     # Non-Mac.
@@ -1188,6 +1195,7 @@ test("base_unittests") {
     "process/process_unittest.cc",
     "process/process_util_unittest.cc",
     "process/process_util_unittest_ios.cc",
+    "profiler/stack_sampling_profiler_unittest.cc",
     "profiler/tracked_time_unittest.cc",
     "rand_util_unittest.cc",
     "scoped_clear_errno_unittest.cc",
@@ -1248,15 +1256,6 @@ test("base_unittests") {
     "timer/mock_timer_unittest.cc",
     "timer/timer_unittest.cc",
     "tools_sanity_unittest.cc",
-    "trace_event/memory_dump_manager_unittest.cc",
-    "trace_event/process_memory_maps_dump_provider_unittest.cc",
-    "trace_event/process_memory_totals_dump_provider_unittest.cc",
-    "trace_event/trace_event_argument_unittest.cc",
-    "trace_event/trace_event_memory_unittest.cc",
-    "trace_event/trace_event_synthetic_delay_unittest.cc",
-    "trace_event/trace_event_system_stats_monitor_unittest.cc",
-    "trace_event/trace_event_unittest.cc",
-    "trace_event/trace_event_win_unittest.cc",
     "tracked_objects_unittest.cc",
     "tuple_unittest.cc",
     "values_unittest.cc",
@@ -1294,6 +1293,7 @@ test("base_unittests") {
     "//base/test:test_support",
     "//base/third_party/dynamic_annotations",
     "//base/third_party/nspr",
+    "//base/trace_event:trace_event_unittests",
     "//testing/gmock",
     "//testing/gtest",
     "//third_party/icu",