[ios Mojo] Enabled Mojo WebUI by default.

ios/web/web_state/ui/crw_web_controller.h

 // 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_WEB_WEB_STATE_UI_CRW_WEB_CONTROLLER_H_
 #define IOS_WEB_WEB_STATE_UI_CRW_WEB_CONTROLLER_H_
 
 #import <UIKit/UIKit.h>
 
 #import "ios/web/net/crw_request_tracker_delegate.h"
@@ skipping 99 matching lines @@
 @property(nonatomic, readonly) CGPoint scrollPosition;
 
 // Returns whether the top of the content is visible.
 @property(nonatomic, readonly) BOOL atTop;
 
 // YES if JavaScript dialogs, HTTP authentication dialogs and window.open
 // calls should be suppressed. Default is NO. When dialog is suppressed
 // |CRWWebDelegate webControllerDidSuppressDialog:| will be called.
 @property(nonatomic, assign) BOOL shouldSuppressDialogs;
 
-// YES if Mojo should be used for WebUI, defaults to NO.
-@property(nonatomic, assign) BOOL useMojoForWebUI;
-
 // Designated initializer. Initializes web controller with |webState|. The
 // calling code must retain the ownership of |webState|.
 - (instancetype)initWithWebState:(web::WebStateImpl*)webState;
 
 // Return an image to use as replacement of a missing snapshot.
 + (UIImage*)defaultSnapshotImage;
 
 // Replaces the currently displayed content with |contentView|.  The content
 // view will be dismissed for the next navigation.
 - (void)showTransientContentView:(CRWContentView*)contentView;
@@ skipping 202 matching lines @@
 
 // Acts on a single message from the JS object, parsed from JSON into a
 // DictionaryValue. Returns NO if the format for the message was invalid.
 - (BOOL)respondToMessage:(base::DictionaryValue*)crwMessage
        userIsInteracting:(BOOL)userIsInteracting
                originURL:(const GURL&)originURL;
 
 @end
 
 #endif  // IOS_WEB_WEB_STATE_UI_CRW_WEB_CONTROLLER_H_