Remove legacy InfoBarViewProtocol.

ios/chrome/browser/ui/infobars/infobar_view.h

 // Copyright (c) 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_INFOBARS_INFOBAR_VIEW_H_
 #define IOS_CHROME_BROWSER_UI_INFOBARS_INFOBAR_VIEW_H_
 
 #import <UIKit/UIKit.h>
 
 #import "ios/chrome/browser/ui/fancy_ui/bidi_container_view.h"
-#import "ios/chrome/browser/ui/infobars/infobar_view_protocol.h"
 
 class InfoBarViewDelegate;
-@protocol InfoBarViewProtocol;
 
 // UIView representing a single infobar.
-@interface InfoBarView : BidiContainerView<InfoBarViewProtocol>
+@interface InfoBarView : BidiContainerView
+
 - (instancetype)initWithFrame:(CGRect)frame
                      delegate:(InfoBarViewDelegate*)delegate;
+
+// How much of infobar is visible. The infobar is only partly visible during
+// showing/hiding animation.
+@property(nonatomic, assign) CGFloat visibleHeight;
+
+// Label text with links initialized with |stringAsLink:|.
+@property(nonatomic, readonly) NSString* markedLabel;
+
+// Stops propagating events to delegate.
+- (void)resetDelegate;
+
+// TODO(crbug.com/302582): rename methods from add* to set*.
+// Adds a dismiss button subview.
+- (void)addCloseButtonWithTag:(NSInteger)tag
+                       target:(id)target
+                       action:(SEL)action;
+
+// Adds icon subview.
+- (void)addLeftIcon:(UIImage*)image;
+
+// Adds transparent icon of size |imageSize| as placeholder during the time when
+// the icon is being downloaded.
+- (void)addPlaceholderTransparentIcon:(CGSize const&)imageSize;
+
+// Adds an icon subview with rounded corners and a shadow.
+- (void)addLeftIconWithRoundedCornersAndShadow:(UIImage*)image;
+
+// Creates a new string from |string| that is interpreted as a link by
+// |addLabel:|. |tag| must not be 0.
++ (NSString*)stringAsLink:(NSString*)string tag:(NSUInteger)tag;
+
+// Adds a message to the infobar that optionaly contains links initialized with
+// |stringAsLink:|.
+- (void)addLabel:(NSString*)label;
+
+// Adds a message to the infobar that optionaly contains links initialized with
+// |stringAsLink:|. |action| is called on |target| when a link is clicked.
+- (void)addLabel:(NSString*)label target:(id)target action:(SEL)action;
+
+// Adds two buttons to the infobar. Button1 is the primary action of the infobar
+// and in Material Design mode is shown with bold colors to reflect this role.
+- (void)addButton1:(NSString*)title1
+              tag1:(NSInteger)tag1
+           button2:(NSString*)title2
+              tag2:(NSInteger)tag2
+            target:(id)target
+            action:(SEL)action;
+
+// Adds a button to the infobar.
+- (void)addButton:(NSString*)title
+              tag:(NSInteger)tag
+           target:(id)target
+           action:(SEL)action;
+
+// Adds to the infobar a switch and an adjacent label.
+- (void)addSwitchWithLabel:(NSString*)label
+                      isOn:(BOOL)isOn
+                       tag:(NSInteger)tag
+                    target:(id)target
+                    action:(SEL)action;
+
 @end
 
 #endif  // IOS_CHROME_BROWSER_UI_INFOBARS_INFOBAR_VIEW_H_