Add haptic feedback for swipe-to-go-back.

ios/chrome/browser/ui/overscroll_actions/overscroll_actions_controller.mm

Index: ios/chrome/browser/ui/overscroll_actions/overscroll_actions_controller.mm
diff --git a/ios/chrome/browser/ui/overscroll_actions/overscroll_actions_controller.mm b/ios/chrome/browser/ui/overscroll_actions/overscroll_actions_controller.mm
index d4a463aac78cee4b80ce267107462a38bdf80ff8..2016efe8270631a77b1acb867e8788d8851dc10d 100644
--- a/ios/chrome/browser/ui/overscroll_actions/overscroll_actions_controller.mm
+++ b/ios/chrome/browser/ui/overscroll_actions/overscroll_actions_controller.mm
@@ -7,7 +7,6 @@
 #import <QuartzCore/QuartzCore.h>
 
 #include <algorithm>
-#include "base/ios/ios_util.h"
 #include "base/logging.h"
 #include "base/mac/objc_property_releaser.h"
 #include "base/mac/scoped_nsobject.h"
@@ -17,6 +16,7 @@
 #include "ios/chrome/browser/ui/rtl_geometry.h"
 #import "ios/chrome/browser/ui/toolbar/toolbar_controller.h"
 #import "ios/chrome/browser/ui/toolbar/web_toolbar_controller.h"
+#include "ios/chrome/browser/ui/uikit_ui_util.h"
 #import "ios/chrome/browser/ui/voice/voice_search_notification_names.h"
 #import "ios/web/public/web_state/crw_web_view_proxy.h"
 
@@ -652,26 +652,6 @@ NSString* const kOverscrollActionsDidEnd = @"OverscrollActionsDidStop";
   [self clear];
 }
 
-// On iOS10 and above, trigger a haptic vibration for the user selecting an
-// action. This is a no-op for devices that do not support it.
-- (void)triggerHapticFeedbackForAction {
-  if (base::ios::IsRunningOnIOS10OrLater()) {
-    base::scoped_nsobject<UIImpactFeedbackGenerator> generator(
-        [[UIImpactFeedbackGenerator alloc] init]);
-    [generator impactOccurred];
-  }
-}
-
-// On iOS10 and above, trigger a haptic vibration for the change in selection.
-// This is a no-op for devices that do not support it.
-- (void)triggerHapticFeedbackForSelectionChange {
-  if (base::ios::IsRunningOnIOS10OrLater()) {
-    base::scoped_nsobject<UISelectionFeedbackGenerator> generator(
-        [[UISelectionFeedbackGenerator alloc] init]);
-    [generator selectionChanged];
-  }
-}
-
 - (BOOL)isOverscrollActionEnabled {
   return _overscrollActionLock == 0 && _allowPullingActions &&
          !_isOverscrollActionsDisabledForLoading;
@@ -700,7 +680,7 @@ NSString* const kOverscrollActionsDidEnd = @"OverscrollActionsDidStop";
         dispatch_async(dispatch_get_main_queue(), ^{
           [self recordMetricForTriggeredAction:self.overscrollActionView
                                                    .selectedAction];
-          [self triggerHapticFeedbackForAction];
+          TriggerHapticFeedbackForAction();
           [self.delegate overscrollActionsController:self
                                     didTriggerAction:self.overscrollActionView
                                                          .selectedAction];
@@ -917,7 +897,7 @@ NSString* const kOverscrollActionsDidEnd = @"OverscrollActionsDidStop";
   [self scrollView].panGestureRecognizer.enabled = YES;
   [self startBounceWithInitialVelocity:CGPointZero];
 
-  [self triggerHapticFeedbackForAction];
+  TriggerHapticFeedbackForAction();
   [self.delegate
       overscrollActionsController:self
                  didTriggerAction:self.overscrollActionView.selectedAction];
@@ -925,7 +905,7 @@ NSString* const kOverscrollActionsDidEnd = @"OverscrollActionsDidStop";
 
 - (void)overscrollActionsView:(OverscrollActionsView*)view
       selectedActionDidChange:(OverscrollAction)newAction {
-  [self triggerHapticFeedbackForSelectionChange];
+  TriggerHapticFeedbackForSelectionChange();
 }
 
 @end