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

content/test/BUILD.gn

Index: content/test/BUILD.gn
diff --git a/content/test/BUILD.gn b/content/test/BUILD.gn
index 4a10b6d6657a912db51ab8cd6bc62535e27d96ce..353367a923302f659b4ae13c12a41f55d43f8d47 100644
--- a/content/test/BUILD.gn
+++ b/content/test/BUILD.gn
@@ -324,11 +324,6 @@ if (!is_mac) {
 
     data_deps = [ "//ppapi:ppapi_tests" ]  # Loaded at runtime.
 
-    if (!is_chromeos) {
-      sources -=
-          [ "../browser/web_contents/touch_editable_impl_aura_browsertest.cc" ]
-    }
-
     if (is_win) {
       sources += rebase_path(
               content_tests_gypi_values.content_browsertests_win_sources,
@@ -414,9 +409,16 @@ if (!is_mac) {
               "//content")
     }
 
-    if (!use_aura) {
-      sources -=
-          [ "../browser/web_contents/web_contents_view_aura_browsertest.cc" ]
+    if (use_aura) {
+      deps += [
+        "//ui/touch_selection:test_support",
+        "//ui/touch_selection:touch_selection",
+      ]
+    } else {
+      sources -= [
+        "../browser/renderer_host/input/touch_selection_controller_client_aura_browsertest.cc",
+        "../browser/web_contents/web_contents_view_aura_browsertest.cc",
+      ]
     }
   }
 }