Reland: Implement Aura side of unified touch text selection for contents

content/browser/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/features.gni")
 import("//build/config/ui.gni")
 import("//content/browser/browser.gni")
 import("//media/media_options.gni")
 
 source_set("browser") {
@@ skipping 342 matching lines @@
       "//ui/strings",
       "//ui/wm",
     ]
   } else {  # Not aura.
     sources -= [
       "renderer_host/input/synthetic_gesture_target_aura.cc",
       "renderer_host/input/synthetic_gesture_target_aura.h",
       "renderer_host/native_web_keyboard_event_aura.cc",
       "renderer_host/render_widget_host_view_aura.cc",
       "renderer_host/render_widget_host_view_aura.h",
+      "renderer_host/touch_handle_drawable_aura.cc",
+      "renderer_host/touch_handle_drawable_aura.h",
+      "renderer_host/touch_selection_controller_aura.cc",
+      "renderer_host/touch_selection_controller_aura.h",
       "renderer_host/ui_events_helper.cc",
       "renderer_host/ui_events_helper.h",
       "renderer_host/web_input_event_aura.cc",
       "renderer_host/web_input_event_aura.h",
       "web_contents/aura/gesture_nav_simple.cc",
       "web_contents/aura/gesture_nav_simple.h",
       "web_contents/aura/image_window_delegate.cc",
       "web_contents/aura/image_window_delegate.h",
       "web_contents/aura/overscroll_navigation_overlay.cc",
       "web_contents/aura/overscroll_navigation_overlay.h",
       "web_contents/aura/shadow_layer_delegate.cc",
       "web_contents/aura/shadow_layer_delegate.h",
       "web_contents/aura/window_slider.cc",
       "web_contents/aura/window_slider.h",
-      "web_contents/touch_editable_impl_aura.cc",
-      "web_contents/touch_editable_impl_aura.h",
       "web_contents/web_contents_view_aura.cc",
       "web_contents/web_contents_view_aura.h",
     ]
   }
 
   if (use_aura || is_mac) {
     sources += rebase_path(
       content_browser_gypi_values.compositor_browser_sources,
       ".", "//content")
     if (!use_x11) {
@@ skipping 27 matching lines @@
 
   if (enable_browser_cdms) {
     sources += [
       "media/cdm/browser_cdm_manager.cc",
       "media/cdm/browser_cdm_manager.h",
       "media/media_web_contents_observer.cc",
       "media/media_web_contents_observer.h",
     ]
   }
 }