Move enum MenuAnchorPosition to reduce deps on menu_item_view.h

chrome/browser/ui/views/frame/browser_frame.cc

Index: chrome/browser/ui/views/frame/browser_frame.cc
diff --git a/chrome/browser/ui/views/frame/browser_frame.cc b/chrome/browser/ui/views/frame/browser_frame.cc
index 4b4606c4f78ff5faa2f1e16e5eee495b70251665..ca38b782fe7c237ee0a0433c4cdca688a523444d 100644
--- a/chrome/browser/ui/views/frame/browser_frame.cc
+++ b/chrome/browser/ui/views/frame/browser_frame.cc
@@ -256,12 +256,16 @@ void BrowserFrame::ShowContextMenuForView(views::View* source,
   int hit_test = non_client_view()->NonClientHitTest(point_in_view_coords);
   if (hit_test == HTCAPTION || hit_test == HTNOWHERE) {
     menu_runner_.reset(new views::MenuRunner(GetSystemMenuModel()));
-    if (menu_runner_->RunMenuAt(source->GetWidget(), NULL,
-          gfx::Rect(p, gfx::Size(0,0)), views::MenuItemView::TOPLEFT,
-          source_type,
-          views::MenuRunner::HAS_MNEMONICS | views::MenuRunner::CONTEXT_MENU) ==
-        views::MenuRunner::MENU_DELETED)
+    if (menu_runner_->RunMenuAt(source->GetWidget(),
+                                NULL,
+                                gfx::Rect(p, gfx::Size(0, 0)),
+                                views::MENU_ANCHOR_TOPLEFT,
+                                source_type,
+                                views::MenuRunner::HAS_MNEMONICS |
+                                    views::MenuRunner::CONTEXT_MENU) ==
+        views::MenuRunner::MENU_DELETED) {
       return;
+    }
   }
 }