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"
@@ skipping 177 matching lines @@
   if (snapshot == [[self class] defaultSnapshotImage])
     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],
-                   [snapshot size].width, [snapshot size].height);
+    CGRect cropRect = CGRectMake(
+        0, [[_tab fullScreenControllerDelegate] 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 {
   if (![webController canUseViewForGeneratingOverlayPlaceholderView])
@@ skipping 46 matching lines @@
 }
 
 - (UIImage*)cachedSnapshotWithOverlays:(NSArray*)overlays
                       visibleFrameOnly:(BOOL)visibleFrameOnly {
   return
       [_coalescingSnapshotContext cachedSnapshotWithOverlays:overlays
                                             visibleFrameOnly:visibleFrameOnly];
 }
 
 @end