Get event targetting working for mouse events.

mojo/services/window_manager/BUILD.gn

Index: mojo/services/window_manager/BUILD.gn
diff --git a/mojo/services/window_manager/BUILD.gn b/mojo/services/window_manager/BUILD.gn
index 2ae22195b0d9770c62babeca4f142b262ad23e47..283f71dd13952fd049cbd66d500ee9a74f0a6094 100644
--- a/mojo/services/window_manager/BUILD.gn
+++ b/mojo/services/window_manager/BUILD.gn
@@ -62,10 +62,18 @@ source_set("lib") {
 # GYP version: mojo/mojo_services.gypi:mojo_core_window_manager_unittests
 test("window_manager_unittests") {
   sources = [
+    "view_target_unittest.cc",
+    "view_targeter_unittest.cc",
     "window_manager_api_unittest.cc",
+    "window_manager_test_util.cc",
+    "window_manager_test_util.h",
     "window_manager_unittests.cc",
   ]
 
+  public_deps = [
+    ":lib",
+  ]
+
   deps = [
     "//base/test:test_support",
     "//mojo/application_manager",
@@ -76,6 +84,9 @@ test("window_manager_unittests") {
     "//mojo/services/public/interfaces/window_manager",
     "//mojo/shell:test_support",
     "//testing/gtest",
+    "//ui/events:test_support",
+    "//ui/gfx",
+    "//ui/gfx:test_support",
     "//ui/gl",
   ]