[iOS Clean] Removed old overlay implementation.

ios/clean/chrome/browser/ui/web_contents/web_coordinator.mm

 // Copyright 2016 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.
 
 #import "ios/clean/chrome/browser/ui/web_contents/web_coordinator.h"
 
 #include "base/mac/foundation_util.h"
 #include "base/memory/ptr_util.h"
 #import "ios/clean/chrome/browser/ui/commands/context_menu_commands.h"
 #import "ios/clean/chrome/browser/ui/context_menu/context_menu_context_impl.h"
 #import "ios/clean/chrome/browser/ui/context_menu/web_context_menu_coordinator.h"
+#import "ios/clean/chrome/browser/ui/overlay_service/browser_coordinator+overlay_support.h"
 #import "ios/clean/chrome/browser/ui/overlay_service/overlay_service.h"
-#import "ios/clean/chrome/browser/ui/overlay_service/overlay_service_factory.h"
 #import "ios/clean/chrome/browser/ui/web_contents/web_contents_mediator.h"
 #import "ios/clean/chrome/browser/ui/web_contents/web_contents_view_controller.h"
 #import "ios/shared/chrome/browser/ui/browser_list/browser.h"
 #import "ios/shared/chrome/browser/ui/commands/command_dispatcher.h"
 #import "ios/shared/chrome/browser/ui/coordinators/browser_coordinator+internal.h"
 #include "ios/web/public/navigation_manager.h"
 #include "ios/web/public/web_state/web_state.h"
 #import "ios/web/public/web_state/web_state_delegate_bridge.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
@@ skipping 28 matching lines @@
   self.webState->SetDelegate(_webStateDelegate.get());
 }
 
 - (void)start {
   // Create the view controller and start it.
   self.viewController = [[WebContentsViewController alloc] init];
   self.mediator.consumer = self.viewController;
   self.mediator.webStateList = &self.browser->web_state_list();
   [super start];
   // Notify the OverlayService that this coordinator is displaying |webState|.
-  OverlayServiceFactory::GetInstance()
-      ->GetForBrowserState(self.browser->browser_state())
-      ->SetWebStateParentCoordinator(self, self.webState);
+  self.overlayService->SetWebStateParentCoordinator(self, self.webState);
 }
 
 - (void)stop {
   // Notify the OverlayService that this coordinator is no longer displaying
   // |webState|.
-  OverlayServiceFactory::GetInstance()
-      ->GetForBrowserState(self.browser->browser_state())
-      ->SetWebStateParentCoordinator(nil, self.webState);
+  self.overlayService->SetWebStateParentCoordinator(nil, self.webState);
   [super stop];
   [self.mediator disconnect];
 }
 
 - (void)childCoordinatorDidStart:(BrowserCoordinator*)childCoordinator {
   // Register to receive relevant ContextMenuCommands.
   if ([childCoordinator isKindOfClass:[WebContextMenuCoordinator class]]) {
     [self.browser->dispatcher()
         startDispatchingToTarget:self
                      forSelector:@selector(executeContextMenuScript:)];
@@ skipping 38 matching lines @@
   ContextMenuContextImpl* context =
       [[ContextMenuContextImpl alloc] initWithParams:params];
   WebContextMenuCoordinator* contextMenu =
       [[WebContextMenuCoordinator alloc] initWithContext:context];
   [self addChildCoordinator:contextMenu];
   [contextMenu start];
   return YES;
 }
 
 @end