Move more of webcore_remaining into GN build files.

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

Index: third_party/WebKit/Source/core/input/BUILD.gn
diff --git a/third_party/WebKit/Source/core/input/BUILD.gn b/third_party/WebKit/Source/core/input/BUILD.gn
index c90de835c5b255287581b733f30058eff63d66bf..e863999060a013b350e0db6925b3e76e2462c4a8 100644
--- a/third_party/WebKit/Source/core/input/BUILD.gn
+++ b/third_party/WebKit/Source/core/input/BUILD.gn
@@ -4,9 +4,7 @@
 
 import("//third_party/WebKit/Source/core/core.gni")
 
-target(core_link_small_target_type, "input") {
-  visibility = [ "//third_party/WebKit/Source/core/*" ]
-
+blink_core_sources("input") {
   sources = [
     "EventHandler.cpp",
     "EventHandler.h",
@@ -26,14 +24,8 @@ target(core_link_small_target_type, "input") {
     "TouchEventManager.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",
-  ]
 }