[Code cleanup]Remove webui keyboard mojo binding

ui/keyboard/BUILD.gn

Index: ui/keyboard/BUILD.gn
diff --git a/ui/keyboard/BUILD.gn b/ui/keyboard/BUILD.gn
index bdb0775deb8f8d6aa8b42a9db8adc7b1aafb22d6..b504ba23c80a1f4b0411e28c474038c4981f4a82 100644
--- a/ui/keyboard/BUILD.gn
+++ b/ui/keyboard/BUILD.gn
@@ -3,7 +3,6 @@
 # found in the LICENSE file.
 
 import("//testing/test.gni")
-import("//third_party/mojo/src/mojo/public/tools/bindings/mojom.gni")
 import("//third_party/google_input_tools/closure.gni")
 import("//third_party/google_input_tools/inputview.gni")
 import("//tools/grit/grit_rule.gni")
@@ -26,27 +25,17 @@ component("keyboard") {
     "keyboard_switches.h",
     "keyboard_util.cc",
     "keyboard_util.h",
-    "webui/vk_mojo_handler.cc",
-    "webui/vk_mojo_handler.h",
-    "webui/vk_webui_controller.cc",
-    "webui/vk_webui_controller.h",
   ]
 
   defines = [ "KEYBOARD_IMPLEMENTATION" ]
 
   deps = [
-    ":keyboard_mojom_bindings",
     ":resources",
     "//base",
     "//base/third_party/dynamic_annotations",
     "//content/public/browser",
     "//content/public/common",
-    "//mojo/environment:chromium",
     "//skia",
-    "//third_party/mojo/src/mojo/edk/js",
-    "//third_party/mojo/src/mojo/edk/system",
-    "//third_party/mojo/src/mojo/public/cpp/bindings",
-    "//third_party/mojo/src/mojo/public/cpp/system",
     "//ui/aura",
     "//ui/base",
     "//ui/base/ime",
@@ -60,13 +49,6 @@ component("keyboard") {
   ]
 }
 
-# GYP version: ui/keyboard/keyboard.gyp:keyboard_mojom_bindings
-mojom("keyboard_mojom_bindings") {
-  sources = [
-    "webui/keyboard.mojom",
-  ]
-}
-
 grit("resources_grit") {
   source = "keyboard_resources.grd"
   outputs = [
@@ -78,20 +60,15 @@ grit("resources_grit") {
 
   input_tools_root_dir = "//third_party/google_input_tools/src/chrome/os"
   inputview_gen_js = "$root_gen_dir/ui/keyboard/resources/inputview.js"
-  keyboard_mojom_gen_js = "$root_gen_dir/ui/keyboard/webui/keyboard.mojom.js"
   grit_flags = [
     "-E",
     "input_tools_root_dir=" + rebase_path(input_tools_root_dir, "."),
     "-E",
     "inputview_gen_js=" + rebase_path(inputview_gen_js, root_build_dir),
-    "-E",
-    "keyboard_mojom_gen_js=" +
-        rebase_path(keyboard_mojom_gen_js, root_build_dir),
   ]
 
   deps = [
     ":inputview",
-    ":keyboard_mojom_bindings",
   ]
 }