[Mac] Bounce app shims when app windows request attention.

chrome/browser/ui/cocoa/apps/native_app_window_cocoa.mm

Index: chrome/browser/ui/cocoa/apps/native_app_window_cocoa.mm
diff --git a/chrome/browser/ui/cocoa/apps/native_app_window_cocoa.mm b/chrome/browser/ui/cocoa/apps/native_app_window_cocoa.mm
index b32f23319bc25485cc26baaf6ae3e88643e5eab6..8e4da633c698adeaeedac96429e91ba531b7bede 100644
--- a/chrome/browser/ui/cocoa/apps/native_app_window_cocoa.mm
+++ b/chrome/browser/ui/cocoa/apps/native_app_window_cocoa.mm
@@ -338,8 +338,7 @@ NativeAppWindowCocoa::NativeAppWindowCocoa(
       shows_fullscreen_controls_(true),
       has_frame_color_(params.has_frame_color),
       active_frame_color_(params.active_frame_color),
-      inactive_frame_color_(params.inactive_frame_color),
-      attention_request_id_(0) {
+      inactive_frame_color_(params.inactive_frame_color) {
   Observe(WebContents());
 
   base::scoped_nsobject<NSWindow> window;
@@ -570,7 +569,7 @@ void NativeAppWindowCocoa::Show() {
   if (is_hidden_with_app_) {
     // If there is a shim to gently request attention, return here. Otherwise
     // show the window as usual.
-    if (apps::ExtensionAppShimHandler::RequestUserAttentionForWindow(
+    if (apps::ExtensionAppShimHandler::ActivateAndRequestUserAttentionForWindow(
             app_window_)) {
       return;
     }
@@ -729,12 +728,10 @@ void NativeAppWindowCocoa::UpdateDraggableRegionViews() {
 }
 
 void NativeAppWindowCocoa::FlashFrame(bool flash) {
-  if (flash) {
-    attention_request_id_ = [NSApp requestUserAttention:NSInformationalRequest];
-  } else {
-    [NSApp cancelUserAttentionRequest:attention_request_id_];
-    attention_request_id_ = 0;
-  }
+  apps::ExtensionAppShimHandler::RequestUserAttentionForWindow(
+      app_window_,
+      flash ? apps::APP_SHIM_ATTENTION_CRITICAL
+            : apps::APP_SHIM_ATTENTION_CANCEL);
 }
 
 bool NativeAppWindowCocoa::IsAlwaysOnTop() const {