[ios] Creates ToolbarCommand for contractingToolbar.

Creates a ToolbarCommands protocol so the ToolbarVC can cancel the omnibox edit.

Bug: 791092
Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Change-Id: I5e283cfd1144b41c6f207103de153f0c6a4d7128
Reviewed-on: https://chromium-review.googlesource.com/804140
Commit-Queue: Sergio Collazos <sczs@chromium.org>
Reviewed-by: Peter Lee <pkl@chromium.org>
Cr-Commit-Position: refs/heads/master@{#521117}

ios/chrome/browser/ui/commands/BUILD.gn

@@ -33,6 +33,7 @@ source_set("commands") {
     "snackbar_commands.h",
     "start_voice_search_command.h",
     "start_voice_search_command.mm",
+    "toolbar_commands.h",
     "tools_menu_commands.h",
   ]
   deps = [

ios/chrome/browser/ui/commands/browser_commands.h

@@ -13,6 +13,7 @@
 #import "ios/chrome/browser/ui/commands/page_info_commands.h"
 #import "ios/chrome/browser/ui/commands/qr_scanner_commands.h"
 #import "ios/chrome/browser/ui/commands/snackbar_commands.h"
+#import "ios/chrome/browser/ui/commands/toolbar_commands.h"
 #import "ios/chrome/browser/ui/commands/tools_menu_commands.h"
 
 @class OpenNewTabCommand;
@@ -27,6 +28,7 @@
                           QRScannerCommands,
                           SnackbarCommands,
                           TabHistoryPopupCommands,
+                          ToolbarCommands,
                           ToolsMenuCommands>
 
 // Closes the current tab.

ios/chrome/browser/ui/commands/toolbar_commands.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_BROWSER_UI_COMMANDS_TOOLBAR_COMMANDS_H_
+#define IOS_CHROME_BROWSER_UI_COMMANDS_TOOLBAR_COMMANDS_H_
+
+// Protocol that describes the commands that trigger Toolbar UI changes.
+@protocol ToolbarCommands
+// Contracts the Toolbar to its regular form.
+- (void)contractToolbar;
+@end
+
+#endif  // IOS_CHROME_BROWSER_UI_COMMANDS_TOOLBAR_COMMANDS_H_

ios/chrome/browser/ui/toolbar/clean/toolbar_view_controller.mm

@@ -433,6 +433,9 @@
   [buttonConstraints
       addObject:[self.contractButton.widthAnchor
                     constraintEqualToConstant:kToolbarButtonWidth]];
+  [self.contractButton addTarget:self.dispatcher
+                          action:@selector(contractToolbar)
+                forControlEvents:UIControlEventTouchUpInside];
 
   // Add buttons to button updater.
   self.buttonUpdater.backButton = self.backButton;

ios/chrome/browser/ui/toolbar/legacy_toolbar_coordinator.mm

@@ -4,6 +4,7 @@
 
 #import "ios/chrome/browser/ui/toolbar/legacy_toolbar_coordinator.h"
 
+#import "ios/chrome/browser/ui/commands/toolbar_commands.h"
 #import "ios/chrome/browser/ui/toolbar/clean/toolbar_button_updater.h"
 #import "ios/chrome/browser/ui/toolbar/omnibox_focuser.h"
 #import "ios/chrome/browser/ui/toolbar/web_toolbar_controller.h"
@@ -38,6 +39,9 @@
     _toolsMenuCoordinator.dispatcher = dispatcher;
     _toolsMenuCoordinator.configurationProvider = configurationProvider;
 
+    [dispatcher startDispatchingToTarget:self
+                             forProtocol:@protocol(ToolbarCommands)];
+
     NSNotificationCenter* defaultCenter = [NSNotificationCenter defaultCenter];
     [defaultCenter addObserver:self
                       selector:@selector(toolsMenuWillShowNotification:)
@@ -274,4 +278,10 @@
   [self.toolbarController setToolsMenuIsVisibleForToolsMenuButton:NO];
 }
 
+#pragma mark - Toolbar Commands
+
+- (void)contractToolbar {
+  [self cancelOmniboxEdit];
+}
+
 @end