[iOS] Upstream chrome commands

ios/chrome/browser/ui/commands/UIKit+ChromeExecuteCommand.h

Index: ios/chrome/browser/ui/commands/UIKit+ChromeExecuteCommand.h
diff --git a/ios/chrome/browser/ui/commands/UIKit+ChromeExecuteCommand.h b/ios/chrome/browser/ui/commands/UIKit+ChromeExecuteCommand.h
new file mode 100644
index 0000000000000000000000000000000000000000..eed6920b4acaf2d0c80343faab38311a87b39a88
--- /dev/null
+++ b/ios/chrome/browser/ui/commands/UIKit+ChromeExecuteCommand.h
@@ -0,0 +1,23 @@
+// Copyright 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef IOS_CHROME_BROWSER_UI_UIKIT_CHROME_EXECUTE_COMMAND_H_
+#define IOS_CHROME_BROWSER_UI_UIKIT_CHROME_EXECUTE_COMMAND_H_
+
+#import <UIKit/UIKit.h>
+
+@interface UIResponder (ChromeExecuteCommand)
+// Executes a Chrome command.  |sender| must implement the |-tag| method and
+// return the id of the command to execute.  The default implementation of this
+// method simply forwards the call to the next responder.
+- (IBAction)chromeExecuteCommand:(id)sender;
+@end
+
+@interface UIWindow (ChromeExecuteCommand)
+// UIResponder addition to execute a Chrome command.  Overridden in UIWindow to
+// forward the call to the application's delegate.
+- (void)chromeExecuteCommand:(id)sender;
+@end
+
+#endif  // IOS_CHROME_BROWSER_UI_UIKIT_CHROME_EXECUTE_COMMAND_H_