exo: Replace pointer based stylus and replace with touch based stylus

components/exo/BUILD.gn

Index: components/exo/BUILD.gn
diff --git a/components/exo/BUILD.gn b/components/exo/BUILD.gn
index 0086efe7f43bf75be9ee915a0237ad2168ac86ef..3390ecffc6b739dd6fb9d636153ffd41da46a00d 100644
--- a/components/exo/BUILD.gn
+++ b/components/exo/BUILD.gn
@@ -89,6 +89,7 @@ source_set("test_support") {
 
   deps = [
     ":exo",
+    "//ash/public/cpp",
     "//ash/test:ash_with_aura_test_support",
     "//ash/test:test_support_without_content",
     "//base",
@@ -98,6 +99,7 @@ source_set("test_support") {
     "//ui/aura",
     "//ui/compositor",
     "//ui/gfx/geometry",
+    "//ui/views",
     "//ui/wm:wm",
   ]
 }