UMA stats for stylus usage

ui/aura/client/aura_constants.cc

Index: ui/aura/client/aura_constants.cc
diff --git a/ui/aura/client/aura_constants.cc b/ui/aura/client/aura_constants.cc
index 2142997bd174b8318acd53314563f643aba7e005..f4c9f9c9e4547a6843abfc3d47c703d51ec280cd 100644
--- a/ui/aura/client/aura_constants.cc
+++ b/ui/aura/client/aura_constants.cc
@@ -24,6 +24,7 @@ namespace client {
 
 DEFINE_WINDOW_PROPERTY_KEY(bool, kAlwaysOnTopKey, false);
 DEFINE_WINDOW_PROPERTY_KEY(bool, kAnimationsDisabledKey, false);
+DEFINE_WINDOW_PROPERTY_KEY(int, kAppType, 0);

[Daniel Erat, 2016/09/27 19:15:10]

can you use the enum here instead of 0?

[xiaoyinh(OOO Sep 11-29), 2016/09/29 20:37:44]

Thanks for the suggestion. I tried including app_types.h here, then static_cast
AppType::OTHERS, it seems to be working. But in general I'm not sure if it is a
good practice to include ash headers in here. 
sky@, could you please advise?

 DEFINE_WINDOW_PROPERTY_KEY(bool, kCanMaximizeKey, false);
 DEFINE_WINDOW_PROPERTY_KEY(bool, kCanMinimizeKey, false);
 DEFINE_WINDOW_PROPERTY_KEY(bool, kCanResizeKey, true);