[Multipaste] Customize Multipaste menu's a11y title

With this CL, when the multipaste menu opens, it announces "Clipboard
history menu opened..."

Bug: 1131548
Change-Id: I351a14e6ae818bbf9f99a7e6ce9cadaa3db69ca8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2523663Reviewed-by: Alex Newcomer <newcomer@chromium.org>
Commit-Queue: Andrew Xu <andrewxu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#825158}

ash/clipboard/clipboard_history_menu_model_adapter.cc

@@ -12,8 +12,10 @@
 #include "ui/base/clipboard/clipboard.h"
 #include "ui/base/data_transfer_policy/data_transfer_endpoint.h"
 #include "ui/base/data_transfer_policy/data_transfer_policy_controller.h"
+#include "ui/base/l10n/l10n_util.h"
 #include "ui/base/ui_base_types.h"
 #include "ui/gfx/geometry/rect.h"
+#include "ui/strings/grit/ui_strings.h"
 #include "ui/views/accessibility/view_accessibility.h"
 #include "ui/views/controls/menu/menu_item_view.h"
 #include "ui/views/controls/menu/menu_runner.h"
@@ -87,6 +89,8 @@ void ClipboardHistoryMenuModelAdapter::Run(
   ClipboardImageModelFactory::Get()->Activate();
 
   root_view_ = CreateMenu();
+  root_view_->SetTitle(
+      l10n_util::GetStringUTF16(IDS_CLIPBOARD_HISTORY_MENU_TITLE));
   menu_runner_ = std::make_unique<views::MenuRunner>(
       root_view_, views::MenuRunner::CONTEXT_MENU |
                       views::MenuRunner::USE_TOUCHABLE_LAYOUT |

ui/strings/ui_strings.grd

@@ -1066,6 +1066,9 @@ need to be translated for each locale.-->
       <message name="IDS_CLIPBOARD_HISTORY_MENU_HTML_IMAGE" desc="Accessibility text for the HTML-rendered image shown on the clipboard history menu">
         HTML content.
       </message>
+      <message name="IDS_CLIPBOARD_HISTORY_MENU_TITLE" desc="The title of the clipboard history menu which shows the history of the clipboard data">
+        Clipboard history
+      </message>
 
       <!-- Strings describing the touch calibration UX -->
       <message name="IDS_DISPLAY_TOUCH_CALIBRATION_EXIT_LABEL" desc="A message to notify the user about using the escape key to exit the calibration mode.">

ui/strings/ui_strings_grd/IDS_CLIPBOARD_HISTORY_MENU_TITLE.png.sha1

+2c4c79721952e341851493f105fb43565589a4e3
\ No newline at end of file