Fix bubble positioning in app windows (Chromium patch)

0001-Fix-bubble-positioning-in-app-windows.patch

From b29d44529f19aa24beeaf197838793b8d1b3d1cf Mon Sep 17 00:00:00 2001
From: Helmut Januschka <[email protected]>
Date: Sun, 1 Feb 2026 23:41:10 +0100
Subject: [PATCH] Fix bubble positioning in app windows

When the toolbar isn't visible (e.g., --app mode), fall back to anchoring
bubbles to the contents view and reposition them to the top-right corner.
---
 .../location_bar_bubble_delegate_view.cc          | 15 +++++++++++++++
 chrome/browser/ui/views/toolbar/toolbar_view.cc   |  9 +++++++++
 2 files changed, 24 insertions(+)

diff --git a/chrome/browser/ui/views/location_bar/location_bar_bubble_delegate_view.cc b/chrome/browser/ui/views/location_bar/location_bar_bubble_delegate_view.cc
index 01a5846cd6d9d..203c9c56c9b8a 100644
--- a/chrome/browser/ui/views/location_bar/location_bar_bubble_delegate_view.cc
+++ b/chrome/browser/ui/views/location_bar/location_bar_bubble_delegate_view.cc
@@ -138,6 +138,21 @@ void LocationBarBubbleDelegateView::ShowForReason(DisplayReason reason,
   GetBubbleFrameView()->SetPreferredArrowAdjustment(
       views::BubbleFrameView::PreferredArrowAdjustment::kOffset);
 
+  // When the anchor view is the contents web view (fallback when toolbar isn't
+  // visible, e.g., in app windows), reposition the bubble to the top-right
+  // corner of the window instead of anchoring to the full contents area.
+  if (auto* anchor_view = GetAnchorView()) {
+    if (auto* widget = anchor_view->GetWidget()) {
+      if (auto* browser_view = BrowserView::GetBrowserViewForNativeWindow(
+              widget->GetNativeWindow())) {
+        if (anchor_view == browser_view->contents_web_view()) {
+          SetAnchorView(nullptr);
+          AdjustForFullscreen(widget->GetWindowBoundsInScreen());
+        }
+      }
+    }
+  }
+
   if (reason == USER_GESTURE) {
     GetWidget()->Show();
   } else {
diff --git a/chrome/browser/ui/views/toolbar/toolbar_view.cc b/chrome/browser/ui/views/toolbar/toolbar_view.cc
index 85b5fd39dfb5a..27176a3177451 100644
--- a/chrome/browser/ui/views/toolbar/toolbar_view.cc
+++ b/chrome/browser/ui/views/toolbar/toolbar_view.cc
@@ -1090,6 +1090,15 @@ views::View* ToolbarView::GetAnchorView(
 views::BubbleAnchor ToolbarView::GetBubbleAnchor(
     std::optional<actions::ActionId> action_id) {
   if (views::View* view = GetAnchorView(action_id)) {
+    // In some window modes (notably app windows) the location bar might exist
+    // as a View but not be drawn. Anchoring bubbles to a non-drawn view can
+    // result in invalid bubble bounds (e.g. on Ozone/Wayland).
+    //
+    // Fall back to anchoring to the contents view in that case.
+    if (!view->IsDrawn() && browser_view_ &&
+        browser_view_->contents_web_view()) {
+      return browser_view_->contents_web_view();
+    }
     return view;
   }
   return nullptr;
-- 
2.52.0