Enhance chrome.app.window API with better shelf integration

extensions/browser/app_window/app_window.cc

Index: extensions/browser/app_window/app_window.cc
diff --git a/extensions/browser/app_window/app_window.cc b/extensions/browser/app_window/app_window.cc
index 7294d6f8463ad5ec09290ae1129b13ae31bd4f1f..a02a9eb9f580bc4025c4c568936b50fd494527da 100644
--- a/extensions/browser/app_window/app_window.cc
+++ b/extensions/browser/app_window/app_window.cc
@@ -171,8 +171,8 @@ AppWindow::CreateParams::CreateParams()
       resizable(true),
       focused(true),
       always_on_top(false),
-      visible_on_all_workspaces(false) {
-}
+      visible_on_all_workspaces(false),
+      show_in_shelf(false) {}
 
 AppWindow::CreateParams::CreateParams(const CreateParams& other) = default;
 
@@ -253,6 +253,7 @@ AppWindow::AppWindow(BrowserContext* context,
       cached_always_on_top_(false),
       requested_alpha_enabled_(false),
       is_ime_window_(false),
+      show_in_shelf_(false),
       image_loader_ptr_factory_(this) {
   ExtensionsBrowserClient* client = ExtensionsBrowserClient::Get();
   CHECK(!client->IsGuestSession(context) || context->IsOffTheRecord())
@@ -296,6 +297,8 @@ void AppWindow::Init(const GURL& url,
 
   is_ime_window_ = params.is_ime_window;
 
+  show_in_shelf_ = params.show_in_shelf;
+
   AppWindowClient* app_window_client = AppWindowClient::Get();
   native_app_window_.reset(
       app_window_client->CreateNativeAppWindow(this, &new_params));