[ios] Style cleanups in tab switcher code.

ios/chrome/browser/ui/tab_switcher/tab_switcher_panel_controller.mm

 // Copyright 2015 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/ui/tab_switcher/tab_switcher_panel_controller.h"
 
 #include "base/logging.h"
 #import "base/mac/scoped_nsobject.h"
 #include "base/strings/sys_string_conversions.h"
 #import "ios/chrome/browser/tabs/tab.h"
@@ skipping 244 matching lines @@
 #pragma mark - SessionCellDelegate
 
 - (TabSwitcherCache*)tabSwitcherCache {
   return _cache;
 }
 
 - (void)cellPressed:(UICollectionViewCell*)cell {
   const NSInteger tabIndex =
       [[_panelView collectionView] indexPathForCell:cell].item;
 
-  if (_sessionType == TabSwitcherSessionType::DISTANT_SESSION) {
+  if (TabSwitcherSessionTypeIsLocalSession(_sessionType)) {
+    Tab* tab = _localSession->tabs()[tabIndex];
+    if (tab)
+      [self.delegate tabSwitcherPanelController:self didSelectLocalTab:tab];
+  } else {
     synced_sessions::DistantTab* tab = _distantSession->tabs[tabIndex].get();
     if (tab)
       [self.delegate tabSwitcherPanelController:self didSelectDistantTab:tab];
-  } else {
-    Tab* tab = _localSession->tabs()[tabIndex];
-    if (tab)
-      [self.delegate tabSwitcherPanelController:self didSelectLocalTab:tab];
   }
 }
 
 - (void)deleteButtonPressedForCell:(UICollectionViewCell*)cell {
-  DCHECK(_sessionType != TabSwitcherSessionType::DISTANT_SESSION);
+  DCHECK(TabSwitcherSessionTypeIsLocalSession(_sessionType));
   const NSInteger tabIndex =
       [[_panelView collectionView] indexPathForCell:cell].item;
   Tab* tab = _localSession->tabs()[tabIndex];
   if (tab)
     [self.delegate tabSwitcherPanelController:self didCloseLocalTab:tab];
 }
 
 #pragma mark - Private
 
 - (BOOL)isOverlayVisible {
@@ skipping 38 matching lines @@
   _panelView.reset(
       [[TabSwitcherPanelView alloc] initWithSessionType:_sessionType]);
   _panelView.get().collectionView.dataSource = self;
 }
 
 - (synced_sessions::DistantSession const*)distantSession {
   return _distantSession.get();
 }
 
 @end