Remove no_size_t_to_int_warning in //ui/base

Bug: 167187
Change-Id: I4b8dfc38ab8b818f0b8af7dbaa7688797ddb40d7
Reviewed-on: https://chromium-review.googlesource.com/c/1393336Reviewed-by: Avi Drissman <avi@chromium.org>
Commit-Queue: Avi Drissman <avi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#619504}

ui/base/BUILD.gn

@@ -47,11 +47,7 @@ component("ui_data_pack") {
 
   defines = [ "UI_DATA_PACK_IMPLEMENTATION" ]
 
-  configs += [
-    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    "//build/config/compiler:no_size_t_to_int_warning",
-    "//build/config/compiler:wexit_time_destructors",
-  ]
+  configs += [ "//build/config/compiler:wexit_time_destructors" ]
 }
 
 buildflag_header("ui_features") {
@@ -406,11 +402,7 @@ jumbo_component("base") {
     ]
   }
 
-  configs += [
-    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    "//build/config/compiler:no_size_t_to_int_warning",
-    "//build/config/compiler:wexit_time_destructors",
-  ]
+  configs += [ "//build/config/compiler:wexit_time_destructors" ]
 
   defines = [ "UI_BASE_IMPLEMENTATION" ]
 
@@ -947,9 +939,6 @@ test("ui_base_unittests") {
     }
   }
 
-  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
-
   deps = [
     ":ui_base_test_resources_grit",
     ":ui_base_unittests_bundle_data",