[iOS Clean] Update ContextMenuItem to use a single command.

ios/clean/chrome/browser/ui/context_menu/context_menu_view_controller.mm

Index: ios/clean/chrome/browser/ui/context_menu/context_menu_view_controller.mm
diff --git a/ios/clean/chrome/browser/ui/context_menu/context_menu_view_controller.mm b/ios/clean/chrome/browser/ui/context_menu/context_menu_view_controller.mm
index c0f282e11961bd320d93c3a32e8e781c9d004b11..7e1d6443ee3905972bc98bc47b66c558eff266ab 100644
--- a/ios/clean/chrome/browser/ui/context_menu/context_menu_view_controller.mm
+++ b/ios/clean/chrome/browser/ui/context_menu/context_menu_view_controller.mm
@@ -5,6 +5,7 @@
 #import "ios/clean/chrome/browser/ui/context_menu/context_menu_view_controller.h"
 
 #include "base/logging.h"
+#import "ios/clean/chrome/browser/ui/commands/context_menu_commands.h"
 #import "ios/clean/chrome/browser/ui/context_menu/context_menu_context.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
@@ -14,19 +15,6 @@
 namespace {
 // Typedef the block parameter for UIAlertAction for readability.
 typedef void (^AlertActionHandler)(UIAlertAction*);
-// Sends |commands| to |dispatcher| using |context| as the menu context.
-void DispatchContextMenuCommands(const std::vector<SEL>& commands,
-                                 id dispatcher,
-                                 ContextMenuContext* context) {
-  DCHECK(dispatcher);
-  DCHECK(context);
-#pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
-  for (SEL command : commands) {
-    [dispatcher performSelector:command withObject:context];
-  }
-#pragma clang diagnostic pop
-}
 }
 
 @interface ContextMenuViewController ()
@@ -87,7 +75,18 @@ - (UIAlertAction*)alertActionForItem:(ContextMenuItem*)item
   DCHECK(item);
   // Create a block that dispatches |item|'s ContextMenuCommands.
   AlertActionHandler handler = ^(UIAlertAction* action) {
-    DispatchContextMenuCommands(item.commands, self.dispatcher, self.context);
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
+    // TODO: Convert to DCHECK once all commands are implemented.
+    if (item.command)
+      [self.dispatcher performSelector:item.command withObject:self.context];
+    // If the command opens a new tab, the context menu will be hidden
+    // automatically.  If not, dispatch |-hideMenuContext:| to stop the menu UI.
+    if (!item.commandOpensTab) {
+      [self.dispatcher performSelector:@selector(hideContextMenu:)
+                            withObject:self.context];
+    }
+#pragma clang diagnostic pop
   };
   return [UIAlertAction actionWithTitle:item.title style:style handler:handler];
 }