Add always-on-top property to app windows

chrome/browser/extensions/api/app_window/app_window_api.cc

Index: chrome/browser/extensions/api/app_window/app_window_api.cc
diff --git a/chrome/browser/extensions/api/app_window/app_window_api.cc b/chrome/browser/extensions/api/app_window/app_window_api.cc
index f21546a62d1bcee875a0b64c75d07d1390e0027c..42a57992ea941383d2f28f16f1e8ace50d96060a 100644
--- a/chrome/browser/extensions/api/app_window/app_window_api.cc
+++ b/chrome/browser/extensions/api/app_window/app_window_api.cc
@@ -93,6 +93,7 @@ void SetCreateResultFromShellWindow(ShellWindow* window,
   result->SetBoolean("fullscreen", window->GetBaseWindow()->IsFullscreen());
   result->SetBoolean("minimized", window->GetBaseWindow()->IsMinimized());
   result->SetBoolean("maximized", window->GetBaseWindow()->IsMaximized());
+  result->SetBoolean("alwaysOnTop", window->GetBaseWindow()->IsAlwaysOnTop());
   base::DictionaryValue* boundsValue = new base::DictionaryValue();
   gfx::Rect bounds = window->GetClientBounds();
   boundsValue->SetInteger("left", bounds.x());
@@ -244,6 +245,11 @@ bool AppWindowCreateFunction::RunImpl() {
     if (options->resizable.get())
       create_params.resizable = *options->resizable.get();
 
+    if (GetCurrentChannel() <= chrome::VersionInfo::CHANNEL_DEV &&

[benwells, 2013/10/09 02:00:50]

It's a pity we can't use _api_features.json for this :(

+        options->always_on_top.get()) {
+      create_params.always_on_top = *options->always_on_top.get();
+    }
+
     if (options->type != extensions::api::app_window::WINDOW_TYPE_PANEL) {
       switch (options->state) {
         case extensions::api::app_window::STATE_NONE: