Primary display change notifications.

services/ui/ws/window_manager_state.cc

Index: services/ui/ws/window_manager_state.cc
diff --git a/services/ui/ws/window_manager_state.cc b/services/ui/ws/window_manager_state.cc
index b00cef218b19968547a7f6cd9543ff1874d74f4e..0a9ca5a14a37b09604c8d8268b33cdc0deb60dd0 100644
--- a/services/ui/ws/window_manager_state.cc
+++ b/services/ui/ws/window_manager_state.cc
@@ -436,7 +436,7 @@ void WindowManagerState::DispatchInputEventToWindowImpl(
 
 void WindowManagerState::AddDebugAccelerators() {
   const DebugAccelerator accelerator = {
-      DebugAcceleratorType::PRINT_WINDOWS, ui::VKEY_S,
+      DebugAcceleratorType::PRINT_WINDOWS, ui::VKEY_B,

[sky, 2016/10/28 17:08:47]

Is there a reason you're changing this?

[kylechar, 2016/10/28 19:40:37]

There is an existing ash shortcut that's mapped to Ctrl+Shift+Alt+S. I'm not
sure which is better to change?

[sky, 2016/10/28 19:59:36]

I tend to think we should make it the same as that in ash for 
PRINT_UI_HIERARCHIES as if you're executing that accelerator you likely want to
see all the windows too. WDYT?

       ui::EF_CONTROL_DOWN | ui::EF_ALT_DOWN | ui::EF_SHIFT_DOWN};
   debug_accelerators_.push_back(accelerator);
 }