Move more of webcore_remaining into GN build files.

third_party/WebKit/Source/core/events/BUILD.gn

 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//third_party/WebKit/Source/core/core.gni")
 
-target(core_link_small_target_type, "events") {
-  visibility = [ "//third_party/WebKit/Source/core/*" ]
-
+blink_core_sources("events") {
   sources = [
     "AddEventListenerOptionsResolved.cpp",
     "AddEventListenerOptionsResolved.h",
     "AnimationEvent.cpp",
     "AnimationEvent.h",
     "AnimationPlayerEvent.cpp",
     "AnimationPlayerEvent.h",
     "ApplicationCacheErrorEvent.cpp",
     "ApplicationCacheErrorEvent.h",
     "BeforeTextInsertedEvent.cpp",
@@ skipping 80 matching lines @@
     "VisualViewportResizeEvent.cpp",
     "VisualViewportResizeEvent.h",
     "VisualViewportScrollEvent.cpp",
     "VisualViewportScrollEvent.h",
     "WheelEvent.cpp",
     "WheelEvent.h",
     "WindowEventContext.cpp",
     "WindowEventContext.h",
   ]
 
-  configs -= core_config_remove
-  configs += core_config_add
   configs += [
     # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
     "//build/config/compiler:no_size_t_to_int_warning",
   ]
-
-  deps = [
-    "//third_party/WebKit/Source/core:prerequisites",
-  ]
 }