MacViews: Run native Cocoa context menus to support Services.

ui/views/controls/scrollbar/base_scroll_bar.cc

Index: ui/views/controls/scrollbar/base_scroll_bar.cc
diff --git a/ui/views/controls/scrollbar/base_scroll_bar.cc b/ui/views/controls/scrollbar/base_scroll_bar.cc
index 5e4d6a56fa384d09ee9687b319bf218a14e3ed17..c93f48e2bb540466047de39c048ac3e03eb74de3 100644
--- a/ui/views/controls/scrollbar/base_scroll_bar.cc
+++ b/ui/views/controls/scrollbar/base_scroll_bar.cc
@@ -294,7 +294,8 @@ void BaseScrollBar::ShowContextMenuForView(View* source,
 
   views::MenuItemView* menu = new views::MenuItemView(this);
   // MenuRunner takes ownership of |menu|.
-  menu_runner_.reset(new MenuRunner(menu));
+  menu_runner_.reset(new MenuRunner(
+      menu, MenuRunner::HAS_MNEMONICS | views::MenuRunner::CONTEXT_MENU));
   menu->AppendDelegateMenuItem(ScrollBarContextMenuCommand_ScrollHere);
   menu->AppendSeparator();
   menu->AppendDelegateMenuItem(ScrollBarContextMenuCommand_ScrollStart);
@@ -305,14 +306,11 @@ void BaseScrollBar::ShowContextMenuForView(View* source,
   menu->AppendSeparator();
   menu->AppendDelegateMenuItem(ScrollBarContextMenuCommand_ScrollPrev);
   menu->AppendDelegateMenuItem(ScrollBarContextMenuCommand_ScrollNext);
-  if (menu_runner_->RunMenuAt(
-          GetWidget(),
-          NULL,
-          gfx::Rect(p, gfx::Size()),
-          MENU_ANCHOR_TOPLEFT,
-          source_type,
-          MenuRunner::HAS_MNEMONICS | views::MenuRunner::CONTEXT_MENU) ==
-      MenuRunner::MENU_DELETED) {
+  if (menu_runner_->RunMenuAt(GetWidget(),
+                              NULL,
+                              gfx::Rect(p, gfx::Size()),
+                              MENU_ANCHOR_TOPLEFT,
+                              source_type) == MenuRunner::MENU_DELETED) {
     return;
   }
 }