[WebModals] New API for browser-scoped popup management.

This interface follows the WebContents-scoped WebContentsModalDialogManager
closely, the main difference being the change in scope -- the popup
manager is intended to manage popups (bubbles and web-modals) scoped both
at the per-WebContents level as well as at the browser/system level.

The policy for the manager is not known yet, so this change is setting up
the API which will be used to register popups with the manager, and the
lifecycle which the manager uses to display them. The critical facts about
a popup are expected to be:

1. Whether it is user-initiated.
2. If it is scoped to a particular WebContents (and if so, which one),
3. If it is overlappable.

Other important management facts about popups may be added later.

The lifecycle operation is all driven through an interface called
SinglePopupManager which is a one-per-window scoped manager owned by
the PopupManager. These classes take charge of showing and hiding
their popups depending on the state of the browser window, as governed
by whatever state change observations made by the overall PopupManager
relate to its policy.

When a window is closed by direct user action, the manager notifies the
overall BubbleManager, which then removes the window from the management
queue and can show another window. A window may also be closed by
direct command from the overall BubbleManager, for example if it is
superceded by another user-initiated popup.

BUG=375393
TBR=yoz

Review URL: https://codereview.chromium.org/287123002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@283099 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 10 insertions, 0 deletions

diff --git a/apps/app_window.cc b/apps/app_window.cc
index e2d837d..db1f543 100644
--- a/apps/app_window.cc
+++ b/apps/app_window.cc
@@ -264,6 +264,7 @@ void AppWindow::Init(const GURL& url,
     content::WebContentsObserver::Observe(web_contents);
   }
   delegate_->InitWebContents(web_contents);
+
   WebContentsModalDialogManager::CreateForWebContents(web_contents);
   // TODO(jamescook): Delegate out this creation.
   extensions::ChromeExtensionWebContentsObserver::CreateForWebContents(
@@ -286,6 +287,10 @@ void AppWindow::Init(const GURL& url,
 
   native_app_window_.reset(delegate_->CreateNativeAppWindow(this, new_params));
 
+  popup_manager_.reset(
+      new web_modal::PopupManager(GetWebContentsModalDialogHost()));
+  popup_manager_->RegisterWith(web_contents);
+
   // Prevent the browser process from shutting down while this window exists.
   AppsClient::Get()->IncrementKeepAliveCount();
   UpdateExtensionAppIcon();
diff --git a/apps/app_window.h b/apps/app_window.h
index f2e0e98..9873eed 100644
--- a/apps/app_window.h
+++ b/apps/app_window.h
@@ -8,6 +8,7 @@
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/sessions/session_id.h"
+#include "components/web_modal/popup_manager.h"
 #include "components/web_modal/web_contents_modal_dialog_manager_delegate.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
@@ -522,6 +523,10 @@ class AppWindow : public content::NotificationObserver,
   scoped_ptr<AppWindowContents> app_window_contents_;
   scoped_ptr<Delegate> delegate_;
 
+  // Manages popup windows (bubbles, tab-modals) visible overlapping the
+  // app window.
+  scoped_ptr<web_modal::PopupManager> popup_manager_;
+
   base::WeakPtrFactory<AppWindow> image_loader_ptr_factory_;
 
   // Bit field of FullscreenType.