[ios clean] Move dispatcher out of Browser.

ios/shared/chrome/browser/ui/coordinators/browser_coordinator.h

Index: ios/shared/chrome/browser/ui/coordinators/browser_coordinator.h
diff --git a/ios/shared/chrome/browser/ui/coordinators/browser_coordinator.h b/ios/shared/chrome/browser/ui/coordinators/browser_coordinator.h
index 4102a3c74b45b18ab3adc4e261eb59ddfa2d3e05..584490153c31c07cd1dbc229f031e65b0050ab95 100644
--- a/ios/shared/chrome/browser/ui/coordinators/browser_coordinator.h
+++ b/ios/shared/chrome/browser/ui/coordinators/browser_coordinator.h
@@ -8,6 +8,7 @@
 #import <UIKit/UIKit.h>
 
 class Browser;
+@class CommandDispatcher;
 
 // An object that manages a UI component via a view controller.
 // This is the public interface to this class; subclasses should also import
@@ -21,6 +22,13 @@ class Browser;
 // doesn't transfer ownership of the browser.
 @property(nonatomic, assign) Browser* browser;
 
+// The dispatcher this object should use to register and send commands.
+// By default this is populated with the parent coordinator's dispatcher.
+@property(nonatomic) CommandDispatcher* dispatcher;
+
+// self.dispatcher cast to |id|
+@property(nonatomic, readonly) id callableDispatcher;
+
 // The basic lifecycle methods for coordinators are -start and -stop. These
 // implementations notify the parent coordinator when this coordinator did start
 // and will stop. Child classes are expected to override and call the superclass