[iOS Clean] Wired up ContextMenuCommands.

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 4178094ccbf8eccadbcfa3b405c446ce6e7a5c3b..8de910738878202a089a750b5804ec42b346383a 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
@@ -4,6 +4,8 @@
 
 #import "ios/clean/chrome/browser/ui/context_menu/context_menu_view_controller.h"
 
+#import "ios/clean/chrome/browser/ui/commands/context_menu_commands.h"
+
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
@@ -21,7 +23,7 @@ @interface ContextMenuViewController ()
 @implementation ContextMenuViewController
 @synthesize dispatcher = _dispatcher;
 
-- (instancetype)initWithDispatcher:(id)dispatcher {
+- (instancetype)initWithDispatcher:(id<ContextMenuCommands>)dispatcher {
   self =
       [[self class] alertControllerWithTitle:nil
                                      message:nil
@@ -51,9 +53,12 @@ - (void)setContextMenuItems:(NSArray<ContextMenuItem*>*)items {
   }
 
   // Always add a cancel action.
+  AlertActionHandler cancelHandler = ^(UIAlertAction* action) {
+    [self.dispatcher cancelContextMenu];
+  };
   [self addAction:[UIAlertAction actionWithTitle:@"Cancel"
                                            style:UIAlertActionStyleCancel
-                                         handler:nil]];
+                                         handler:cancelHandler]];
 }
 
 @end