WIP: Plumbing through text selection granularity control support

ui/touch_selection/BUILD.gn

 # Copyright 2014 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("//build/config/ui.gni")
 
 if (is_android) {
   import("//build/config/android/rules.gni")
 }
 
 component("touch_selection") {
   output_name = "ui_touch_selection"
 
   sources = [
     "selection_event_type.h",
+    "selection_granularity.h",
     "touch_handle.cc",
     "touch_handle.h",
     "touch_handle_drawable_aura.cc",
     "touch_handle_drawable_aura.h",
     "touch_selection_controller.cc",
     "touch_selection_controller.h",
     "touch_selection_controller_aura.cc",
     "touch_selection_controller_aura.h",
     "touch_selection_menu_runner.cc",
     "touch_selection_menu_runner.h",
@@ skipping 50 matching lines @@
 if (is_android) {
   java_cpp_enum("ui_touch_selection_enums_srcjar") {
     sources = [
       "selection_event_type.h",
     ]
     outputs = [
       "org/chromium/ui/touch_selection/SelectionEventType.java",
     ]
   }
 }