Moving LatencyInfo into a separate component.

ui/events/BUILD.gn

Index: ui/events/BUILD.gn
diff --git a/ui/events/BUILD.gn b/ui/events/BUILD.gn
index e2e07b0ac54a561e62a2989c8c3a70037b2ed416..269370146be6f6b746ac0c941f8e7bed6328e29d 100644
--- a/ui/events/BUILD.gn
+++ b/ui/events/BUILD.gn
@@ -67,8 +67,6 @@ component("events_base") {
     "keycodes/keyboard_code_conversion_win.cc",
     "keycodes/keyboard_code_conversion_win.h",
     "keycodes/keyboard_codes.h",
-    "latency_info.cc",
-    "latency_info.h",
   ]
 
   defines = [ "EVENTS_BASE_IMPLEMENTATION" ]
@@ -143,6 +141,7 @@ component("events") {
 
   public_deps = [
     ":events_base",
+    "//ui/latency",
   ]
   deps = [
     ":dom_keycode_converter",
@@ -377,7 +376,6 @@ if (!is_ios) {
       "keycodes/dom/keycode_converter_unittest.cc",
       "keycodes/keyboard_code_conversion_unittest.cc",
       "keycodes/platform_key_map_win_unittest.cc",
-      "latency_info_unittest.cc",
       "platform/platform_event_source_unittest.cc",
       "scoped_target_handler_unittest.cc",
       "win/event_utils_win_unittest.cc",
@@ -409,8 +407,6 @@ if (!is_ios) {
         "blink/web_input_event_unittest.cc",
         "devices/mojo/device_struct_traits_unittest.cc",
         "gestures/blink/web_gesture_curve_impl_unittest.cc",
-        "ipc/latency_info_param_traits_unittest.cc",
-        "mojo/struct_traits_unittest.cc",
       ]
       deps += [
         "//cc",
@@ -421,7 +417,6 @@ if (!is_ios) {
         "//ui/events/blink",
         "//ui/events/devices/mojo:test_interfaces",
         "//ui/events/gestures/blink",
-        "//ui/events/ipc",
         "//ui/events/mojo:test_interfaces",
         "//ui/gfx/ipc/geometry",
       ]