Create headerHeightForTab in TabHeadersDelegate.

ios/chrome/browser/snapshots/web_controller_snapshot_helper.mm

 // Copyright 2014 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/chrome/browser/snapshots/web_controller_snapshot_helper.h"
 
 #import "base/ios/weak_nsobject.h"
 #import "base/mac/scoped_nsobject.h"
 #import "ios/chrome/browser/snapshots/snapshot_manager.h"
 #import "ios/chrome/browser/tabs/tab.h"
-#import "ios/chrome/browser/ui/fullscreen_controller.h"
+#import "ios/chrome/browser/tabs/tab_headers_delegate.h"
 #import "ios/chrome/browser/ui/uikit_ui_util.h"
 #import "ios/web/web_state/ui/crw_web_controller.h"
 
 @interface WebControllerSnapshotHelper ()
 
 // Takes a snapshot image for the WebController's current page. Returns an
 // autoreleased image cropped and scaled appropriately. Returns a default image
 // if a snapshot cannot be generated.
 - (UIImage*)generateSnapshotOrDefaultForWebController:
                 (CRWWebController*)webController
@@ skipping 167 matching lines @@
     return snapshot;
 
   UIImage* snapshotToCache = nil;
   // TODO(crbug.com/370994): Remove all code that references a Tab's delegates
   // from this file.
   if (visibleFrameOnly || ![_tab fullScreenControllerDelegate]) {
     snapshotToCache = snapshot;
   } else {
     // Crops the bottom of the fullscreen snapshot.
     CGRect cropRect =
-        CGRectMake(0, [[_tab fullScreenControllerDelegate] headerHeight],
+        CGRectMake(0, [[_tab tabHeadersDelegate] headerHeightForTab:_tab],
                    [snapshot size].width, [snapshot size].height);
     snapshotToCache = CropImage(snapshot, cropRect);
   }
   [_snapshotManager setImage:snapshotToCache withSessionID:sessionID];
   return snapshot;
 }
 
 - (UIImage*)generateSnapshotForWebController:(CRWWebController*)webController
                                 withOverlays:(NSArray*)overlays
                             visibleFrameOnly:(BOOL)visibleFrameOnly {
@@ skipping 47 matching lines @@
 }
 
 - (UIImage*)cachedSnapshotWithOverlays:(NSArray*)overlays
                       visibleFrameOnly:(BOOL)visibleFrameOnly {
   return
       [_coalescingSnapshotContext cachedSnapshotWithOverlays:overlays
                                             visibleFrameOnly:visibleFrameOnly];
 }
 
 @end