[cr148] ShowSingletonTab migrated to BWI

Chromium changes:
https://chromium.googlesource.com/chromium/src/+/7f61ab9536e34aad9c59e1f79bd0fada6f84a16c

commit 7f61ab9536e34aad9c59e1f79bd0fada6f84a16c
Author: Yu He <yhe@microsoft.com>
Date:   Sun Mar 22 11:57:30 2026 -0700

    [bedrock] Migrate chrome_pages and singleton_tabs from Browser* to BrowserWindowInterface*

    Migrate function signatures in chrome_pages.h/cc and singleton_tabs.h/cc
    to accept BrowserWindowInterface* instead of Browser*.

    This allows callers to pass a BrowserWindowInterface* directly,
    eliminating intermediate GetBrowserForMigrationOnly() calls at:

    extension_install_ui_desktop.cc startup_launch_infobar_manager_impl.cc
    singleton_tabs.cc (internal usage) Also:

    Guard desktop-only includes in notification_common.cc with #if
    !BUILDFLAG(IS_ANDROID) to fix Android build. Add missing browser.h
    include to inspect_ui.cc. Remove forward declaration of Browser from
    chrome_pages.h and singleton_tabs.h.

    Bug: 494010890
    Change-Id: Ica78133224b67d439dc264fa187d261b4ee6f87c
    Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7667947
    Reviewed-by: Qikai Zhong <qikaizhong@microsoft.com>
    Auto-Submit: Yu He <yhe@microsoft.com>
    Commit-Queue: Tom Lukaszewicz <tluk@chromium.org>
    Reviewed-by: Tom Lukaszewicz <tluk@chromium.org>
    Cr-Commit-Position: refs/heads/main@{#1603192}

browser/ui/views/infobars/web_discovery_infobar_content_view.cc

@@ -51,8 +51,7 @@ constexpr int kNarrowLayoutHorizontalPadding = 10;
 
 void OpenMoreInfoPage() {
   if (auto* browser = GetLastActiveBrowserWindowInterfaceWithAnyProfile()) {
-    ShowSingletonTab(browser->GetBrowserForMigrationOnly(),
-                     GURL(kWebDiscoveryLearnMoreUrl));
+    ShowSingletonTab(browser, GURL(kWebDiscoveryLearnMoreUrl));
   }
 }
 

browser/ui/webui/brave_adblock_ui.cc

@@ -31,6 +31,7 @@
 #include "chrome/browser/android/tab_web_contents_delegate_android.h"
 #include "content/public/browser/web_contents.h"
 #else
+#include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "chrome/browser/ui/browser_navigator_params.h"
 #include "chrome/browser/ui/singleton_tabs.h"

browser/ui/webui/settings/brave_adblock_handler.cc

@@ -24,6 +24,7 @@
 #include "brave/components/brave_shields/core/common/pref_names.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "chrome/browser/ui/singleton_tabs.h"
 #include "content/public/browser/web_ui.h"

chromium_src/chrome/browser/ui/singleton_tabs.cc

@@ -12,7 +12,7 @@
 // and remote (on https://www.google.com and https://support.google.com).
 // For remote URLs going to Google we want to point users to our community site
 // instead.
-void ShowSingletonTab(Browser* browser, const GURL& url) {
+void ShowSingletonTab(BrowserWindowInterface* browser, const GURL& url) {
   GURL new_url =
       url.DomainIs("google.com") ? GURL("https://community.brave.app/") : url;