[cr148] ShowTabSearchBubble dropped section arg

This argument was not being used in Brave, so it is of no consequence.

Chromium changes:
https://chromium.googlesource.com/chromium/src/+/bb4630838cd0fd2567b306b6c481750fdf2b95dd

commit bb4630838cd0fd2567b306b6c481750fdf2b95dd
Author: Emily Shack <emshack@chromium.org>
Date:   Mon Mar 9 16:23:28 2026 -0700

    [TabOrganization] Deprecate tab index pref

    Deprecates kTabSearchTabIndex and any reference to tab search sections,
    following up to the removal of auto tab groups and declutter from tab
    search.

    Bug: 488463961
    Change-Id: I5c9ecc7024e2125ddd524f381451c59a8cda1ee2
    Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7630127
    Reviewed-by: Alex Gough <ajgo@chromium.org>
    Commit-Queue: Emily Shack <emshack@chromium.org>
    Reviewed-by: Darryl James <dljames@chromium.org>
    Cr-Commit-Position: refs/heads/main@{#1596690}

browser/ui/views/brave_tab_search_bubble_host.cc

@@ -18,10 +18,9 @@ void BraveTabSearchBubbleHost::SetBubbleArrow(
 }
 
 bool BraveTabSearchBubbleHost::ShowTabSearchBubble(
-    bool triggered_by_keyboard_shortcut,
-    tab_search::mojom::TabSearchSection section) {
-  bool result = TabSearchBubbleHost::ShowTabSearchBubble(
-      triggered_by_keyboard_shortcut, section);
+    bool triggered_by_keyboard_shortcut) {
+  bool result =
+      TabSearchBubbleHost::ShowTabSearchBubble(triggered_by_keyboard_shortcut);
   if (!arrow_ || !result) {
     return result;
   }

browser/ui/views/brave_tab_search_bubble_host.h

@@ -19,9 +19,7 @@ class BraveTabSearchBubbleHost : public TabSearchBubbleHost {
 
   // TabSearchBubbleHost:
   bool ShowTabSearchBubble(
-      bool triggered_by_keyboard_shortcut = false,
-      tab_search::mojom::TabSearchSection section =
-          tab_search::mojom::TabSearchSection::kNone) override;
+      bool triggered_by_keyboard_shortcut = false) override;
 
  private:
   std::optional<views::BubbleBorder::Arrow> arrow_;