Cleanup test_support target names.

ui/events/BUILD.gn

Index: ui/events/BUILD.gn
diff --git a/ui/events/BUILD.gn b/ui/events/BUILD.gn
index acfc671f168ab12531e05ba4a8377ba96ad45f11..d3ed4169134a5979186e2e3c2281bcd90764072e 100644
--- a/ui/events/BUILD.gn
+++ b/ui/events/BUILD.gn
@@ -225,7 +225,7 @@ component("gesture_detection") {
   }
 }
 
-source_set("events_test_support") {
+source_set("test_support") {
   sources = [
     "test/cocoa_test_event_utils.h",
     "test/cocoa_test_event_utils.mm",
@@ -302,12 +302,12 @@ test("events_unittests") {
   deps = [
     ":events",
     ":events_base",
-    ":events_test_support",
     ":gesture_detection",
+    ":test_support",
     "//base",
     "//base/test:run_all_unittests",
     "//skia",
     "//testing/gtest",
-    "//ui/gfx:gfx_test_support",
+    "//ui/gfx:test_support",
   ]
 }