Add always-on-top property to app windows

chrome/browser/extensions/api/app_current_window_internal/app_current_window_internal_api.cc

Index: chrome/browser/extensions/api/app_current_window_internal/app_current_window_internal_api.cc
diff --git a/chrome/browser/extensions/api/app_current_window_internal/app_current_window_internal_api.cc b/chrome/browser/extensions/api/app_current_window_internal/app_current_window_internal_api.cc
index f5cdf91f6ff0cd226e5e9861d5ed23d9eb5d2cb5..142d0d12e60842201006e23a78f0b90206ec39ac 100644
--- a/chrome/browser/extensions/api/app_current_window_internal/app_current_window_internal_api.cc
+++ b/chrome/browser/extensions/api/app_current_window_internal/app_current_window_internal_api.cc
@@ -20,6 +20,8 @@ namespace SetBounds = extensions::api::app_current_window_internal::SetBounds;
 namespace SetIcon = extensions::api::app_current_window_internal::SetIcon;
 namespace SetInputRegion =
     extensions::api::app_current_window_internal::SetInputRegion;
+namespace SetAlwaysOnTop =
+    extensions::api::app_current_window_internal::SetAlwaysOnTop;
 
 using apps::ShellWindow;
 using extensions::api::app_current_window_internal::Bounds;
@@ -202,4 +204,13 @@ bool AppCurrentWindowInternalSetInputRegionFunction::RunWithWindow(
   return true;
 }
 
+bool AppCurrentWindowInternalSetAlwaysOnTopFunction::RunWithWindow(
+    ShellWindow* window) {
+  scoped_ptr<SetAlwaysOnTop::Params> params(
+      SetAlwaysOnTop::Params::Create(*args_));
+  CHECK(params.get());
+  window->GetBaseWindow()->SetAlwaysOnTop(params->always_on_top);
+  return true;
+}
+
 }  // namespace extensions