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

chrome/browser/ui/browser.cc

Index: chrome/browser/ui/browser.cc
diff --git a/chrome/browser/ui/browser.cc b/chrome/browser/ui/browser.cc
index ab723e3f5d2e7e651d343049241523b8144ba540..d3a49fd1a3c92a1e24e79c44f06536e2389e3f65 100644
--- a/chrome/browser/ui/browser.cc
+++ b/chrome/browser/ui/browser.cc
@@ -152,6 +152,7 @@
 #include "components/bookmarks/browser/bookmark_utils.h"
 #include "components/google/core/browser/google_url_tracker.h"
 #include "components/startup_metric_utils/startup_metric_utils.h"
+#include "components/web_modal/popup_manager.h"
 #include "components/web_modal/web_contents_modal_dialog_manager.h"
 #include "content/public/browser/devtools_manager.h"
 #include "content/public/browser/download_item.h"
@@ -444,6 +445,12 @@ Browser::Browser(const CreateParams& params)
   }
 
   fullscreen_controller_.reset(new FullscreenController(this));
+
+  // Must be initialized after window_.
+  // Also: surprise! a modal dialog host is not necessary to host modal dialogs
+  // without a modal dialog host, so that value may be null.
+  popup_manager_.reset(new web_modal::PopupManager(
+      GetWebContentsModalDialogHost()));
 }
 
 Browser::~Browser() {
@@ -892,6 +899,10 @@ void Browser::TabInsertedAt(WebContents* contents,
                             int index,
                             bool foreground) {
   SetAsDelegate(contents, true);
+
+  if (popup_manager_)
+    popup_manager_->RegisterWith(contents);
+
   SessionTabHelper* session_tab_helper =
       SessionTabHelper::FromWebContents(contents);
   session_tab_helper->SetWindowID(session_id());
@@ -933,6 +944,9 @@ void Browser::TabClosingAt(TabStripModel* tab_strip_model,
       content::Source<NavigationController>(&contents->GetController()),
       content::NotificationService::NoDetails());
 
+  if (popup_manager_)
+    popup_manager_->UnregisterWith(contents);
+
   // Sever the WebContents' connection back to us.
   SetAsDelegate(contents, false);
 }
@@ -948,6 +962,10 @@ void Browser::TabDetachedAt(WebContents* contents, int index) {
       session_service->SetSelectedTabInWindow(session_id(),
                                               old_active_index - 1);
   }
+
+  if (popup_manager_)
+    popup_manager_->UnregisterWith(contents);
+
   TabDetachedAtImpl(contents, index, DETACH_TYPE_DETACH);
 }