Implement hit tests/client area.

ui/aura/BUILD.gn

Index: ui/aura/BUILD.gn
diff --git a/ui/aura/BUILD.gn b/ui/aura/BUILD.gn
index 1c3f5955ac345a7d1e7c5e08e75286076ad1b83c..01aaf4ad4606c8134f45ed542ac7460b07710065 100644
--- a/ui/aura/BUILD.gn
+++ b/ui/aura/BUILD.gn
@@ -327,6 +327,7 @@ test("aura_unittests") {
     "mus/os_exchange_data_provider_mus_unittest.cc",
     "mus/property_converter_unittest.cc",
     "mus/window_tree_client_unittest.cc",
+    "mus/window_tree_host_mus_unittest.cc",
     "test/run_all_unittests.cc",
     "window_event_dispatcher_unittest.cc",
     "window_targeter_unittest.cc",
@@ -350,6 +351,7 @@ test("aura_unittests") {
     "//ui/gfx",
     "//ui/gfx/geometry",
     "//ui/gl:test_support",
+    "//ui/wm:wm",

[sky, 2016/11/19 15:29:31]

no need for the ":wm"

[Elliot Glaysher, 2016/11/22 00:48:07]

Deleted line entirely.

   ]
 
   if (is_linux) {