cros: anchor touch and mouse menus the same

As per request from ux, anchor touch and mouse menus similarly.

Previously touch menus were anchored based on the app icon,
and mouse menus were anchored on the click point.

Now we will anchor all menus on the app icon.

Bug: 846939
Change-Id: I6d2aea28096701c0109081059be40dca5a9ce93c
Reviewed-on: https://chromium-review.googlesource.com/1077308
Commit-Queue: Alex Newcomer <newcomer@chromium.org>
Reviewed-by: Jenny Zhang <jennyz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#564940}

ui/app_list/views/app_list_item_view.cc

@@ -299,13 +299,11 @@ void AppListItemView::OnContextMenuModelReceived(
                  views::MenuRunner::FIXED_ANCHOR |
                  views::MenuRunner::CONTEXT_MENU;
     anchor_position = views::MENU_ANCHOR_BUBBLE_TOUCHABLE_LEFT;
-    if (source_type == ui::MENU_SOURCE_TOUCH) {
-      anchor_rect = apps_grid_view_->GetIdealBounds(this);
-      // Anchor the menu to the same rect that is used for selection highlight.
-      anchor_rect.ClampToCenteredSize(
-          gfx::Size(kGridSelectedSize, kGridSelectedSize));
-      views::View::ConvertRectToScreen(apps_grid_view_, &anchor_rect);
-    }
+    anchor_rect = apps_grid_view_->GetIdealBounds(this);
+    // Anchor the menu to the same rect that is used for selection highlight.
+    anchor_rect.ClampToCenteredSize(
+        gfx::Size(kGridSelectedSize, kGridSelectedSize));
+    views::View::ConvertRectToScreen(apps_grid_view_, &anchor_rect);
   }
 
   context_menu_ = std::make_unique<AppListMenuModelAdapter>(

ui/app_list/views/search_result_tile_item_view.cc

@@ -373,12 +373,10 @@ void SearchResultTileItemView::OnGetContextMenuModel(
     run_types |= views::MenuRunner::USE_TOUCHABLE_LAYOUT |
                  views::MenuRunner::CONTEXT_MENU |
                  views::MenuRunner::FIXED_ANCHOR;
-    if (source_type == ui::MenuSourceType::MENU_SOURCE_TOUCH) {
-      anchor_rect = source->GetBoundsInScreen();
-      // Anchor the menu to the same rect that is used for selection highlight.
-      anchor_rect.ClampToCenteredSize(
-          gfx::Size(kGridSelectedSize, kGridSelectedSize));
-    }
+    anchor_rect = source->GetBoundsInScreen();
+    // Anchor the menu to the same rect that is used for selection highlight.
+    anchor_rect.ClampToCenteredSize(
+        gfx::Size(kGridSelectedSize, kGridSelectedSize));
   }
 
   context_menu_ = std::make_unique<AppListMenuModelAdapter>(