Renames SessionChanges and SessionCellData to have a TabSwitcher prefix.

ios/chrome/browser/ui/tab_switcher/tab_switcher_session_cell_data.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_session_cell_data.h"
 #include "ios/chrome/grit/ios_strings.h"
 #include "ui/base/l10n/l10n_util.h"
 
-@implementation SessionCellData
+@implementation TabSwitcherSessionCellData
 
 @synthesize type = _type;
 @synthesize title = _title;
 @synthesize image = _image;
 
 + (instancetype)incognitoSessionCellData {
-  static SessionCellData* incognitoSessionCellData = nil;
+  static TabSwitcherSessionCellData* incognitoSessionCellData = nil;
   static dispatch_once_t onceToken;
   dispatch_once(&onceToken, ^{
     incognitoSessionCellData =
         [[self alloc] initWithSessionCellType:kIncognitoSessionCell];
   });
   return incognitoSessionCellData;
 }
 
 + (instancetype)openTabSessionCellData {
-  static SessionCellData* openTabSessionCellData = nil;
+  static TabSwitcherSessionCellData* openTabSessionCellData = nil;
   static dispatch_once_t onceToken;
   dispatch_once(&onceToken, ^{
     openTabSessionCellData =
         [[self alloc] initWithSessionCellType:kOpenTabSessionCell];
   });
   return openTabSessionCellData;
 }
 
 + (instancetype)otherDevicesSessionCellData {
-  static SessionCellData* otherDevicesSessionCellData = nil;
+  static TabSwitcherSessionCellData* otherDevicesSessionCellData = nil;
   static dispatch_once_t onceToken;
   dispatch_once(&onceToken, ^{
     otherDevicesSessionCellData =
         [[self alloc] initWithSessionCellType:kGenericRemoteSessionCell];
   });
   return otherDevicesSessionCellData;
 }
 
 - (instancetype)initWithSessionCellType:(TabSwitcherSessionCellType)type {
   self = [super init];
@@ skipping 35 matching lines @@
       messageId = IDS_IOS_TAB_SWITCHER_HEADER_OTHER_DEVICES_TABS;
       break;
   }
   [self setTitle:l10n_util::GetNSString(messageId)];
   UIImage* image = [UIImage imageNamed:imageName];
   image = [image imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
   [self setImage:image];
 }
 
 @end