Add support in widget to open search modes + copied link in app.

ios/chrome/widget_extension/widget_view.h

 // Copyright 2017 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_WIDGET_EXTENSION_WIDGET_VIEW_H_
 #define IOS_CHROME_WIDGET_EXTENSION_WIDGET_VIEW_H_
 
 #import <UIKit/UIKit.h>
 
 // Protocol to be implemented by targets for user actions coming from the widget
 // view.
 @protocol WidgetViewActionTarget
 
-// Called when the user taps the fake omnibox.
-- (void)openApp:(id)sender;
+// Called when the user taps the Search button.
+- (void)openSearch:(id)sender;
+// Called when the user taps the Incognito Search button.
+- (void)openIncognito:(id)sender;
+// Called when the user taps the Voice Search button.
+- (void)openVoice:(id)sender;
+// Called when the user taps the QR Code button.
+- (void)openQRCode:(id)sender;
+// Called when the user taps the Open Copied URL section.
+- (void)openCopiedURL:(id)sender;
 
 @end
 
 // View for the widget. Shows a blinking cursor for a fake omnibox and calls the
 // target when tapped.
 @interface WidgetView : UIView
 
 // Designated initializer, creates the widget view with a |target| for user
 // actions.
 - (instancetype)initWithActionTarget:(id<WidgetViewActionTarget>)target
     NS_DESIGNATED_INITIALIZER;
 - (instancetype)initWithFrame:(CGRect)frame NS_UNAVAILABLE;
 - (instancetype)initWithCoder:(NSCoder*)aDecoder NS_UNAVAILABLE;
 
+// Updates the copied URL.
+- (void)updateCopiedURL:(NSString*)copiedURL;
+
 @end
 
 #endif  // IOS_CHROME_WIDGET_EXTENSION_WIDGET_VIEW_H_