Revert 220417 "[temporary M30 fix] Disable dragging tabs with we..."

trunk/src/chrome/browser/ui/views/tabs/browser_tab_strip_controller.cc

Index: trunk/src/chrome/browser/ui/views/tabs/browser_tab_strip_controller.cc
===================================================================
--- trunk/src/chrome/browser/ui/views/tabs/browser_tab_strip_controller.cc	(revision 221832)
+++ trunk/src/chrome/browser/ui/views/tabs/browser_tab_strip_controller.cc	(working copy)
@@ -26,7 +26,6 @@
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/url_constants.h"
-#include "components/web_modal/web_contents_modal_dialog_manager.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/user_metrics.h"
 #include "content/public/browser/web_contents.h"
@@ -39,7 +38,6 @@
 
 using content::UserMetricsAction;
 using content::WebContents;
-using web_modal::WebContentsModalDialogManager;
 
 namespace {
 
@@ -366,15 +364,6 @@
       static_cast<int>(tabstrip_->layout_type()));
 }
 
-bool BrowserTabStripController::IsTabShowingWebViewModalDialog(int index) {
-  DCHECK(model_->ContainsIndex(index));
-  WebContentsModalDialogManager* contents_modal_dialog_manager =
-      WebContentsModalDialogManager::FromWebContents(
-          model_->GetWebContentsAt(index));
-  return contents_modal_dialog_manager &&
-      contents_modal_dialog_manager->IsShowingDialog();
-}
-
 void BrowserTabStripController::OnStartedDraggingTabs() {
   BrowserView* browser_view = BrowserView::GetBrowserViewForBrowser(browser_);
   if (browser_view && !immersive_reveal_lock_.get()) {