Renames SessionChanges and SessionCellData to have a TabSwitcher prefix.

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"
 #include "ios/chrome/browser/ui/ntp/recent_tabs/synced_sessions.h"
-#import "ios/chrome/browser/ui/tab_switcher/session_changes.h"
 #import "ios/chrome/browser/ui/tab_switcher/tab_switcher_cache.h"
 #import "ios/chrome/browser/ui/tab_switcher/tab_switcher_panel_cell.h"
 #import "ios/chrome/browser/ui/tab_switcher/tab_switcher_panel_overlay_view.h"
 #import "ios/chrome/browser/ui/tab_switcher/tab_switcher_panel_view.h"
+#include "ios/chrome/browser/ui/tab_switcher/tab_switcher_session_changes.h"
 
 namespace {
 
 void FillVectorWithHashesUsingDistantSession(
     synced_sessions::DistantSession const& session,
     std::vector<size_t>* hashes) {
   DCHECK(hashes);
   DCHECK(hashes->empty());
   for (size_t i = 0; i < session.tabs.size(); ++i) {
     hashes->push_back(session.tabs[i]->hashOfUserVisibleProperties());
@@ skipping 75 matching lines @@
   if (_sessionType == TabSwitcherSessionType::DISTANT_SESSION) {
     return NO;
   } else {
     return ![self isOverlayVisible];
   }
 }
 
 - (void)updateCollectionViewIfNeeded {
   if (_sessionType == TabSwitcherSessionType::DISTANT_SESSION) {
     UICollectionView* collectionView = [_panelView collectionView];
-    // TODO(crbug.com/633928) Compute SessionChanges outside of the
+    // TODO(crbug.com/633928) Compute TabSwitcherSessionChanges outside of the
     // updateBlock.
     auto updateBlock = ^{
       std::unique_ptr<const synced_sessions::DistantSession> newDistantSession =
           [_model distantSessionForTag:_sessionTag];
       std::vector<size_t> oldTabsHashes;
       std::vector<size_t> newTabsHashes;
       FillVectorWithHashesUsingDistantSession(*_distantSession.get(),
                                               &oldTabsHashes);
       FillVectorWithHashesUsingDistantSession(*newDistantSession.get(),
                                               &newTabsHashes);
-      SessionChanges changes(oldTabsHashes, newTabsHashes);
-      if (changes.hasChanges()) {
+      TabSwitcherSessionChanges changes(oldTabsHashes, newTabsHashes);
+      if (changes.HasChanges()) {
         _distantSession = std::move(newDistantSession);
         [self applyChanges:changes toCollectionView:collectionView];
       }
     };
     [collectionView performBatchUpdates:updateBlock completion:nil];
   } else {
     UICollectionView* collectionView = [_panelView collectionView];
     auto updateBlock = ^{
       std::unique_ptr<const TabModelSnapshot> newLocalSession =
           [_model tabModelSnapshotForLocalSession:_sessionType];
-      SessionChanges changes(_localSession->hashes(),
-                             newLocalSession->hashes());
-      if (changes.hasChanges()) {
+      TabSwitcherSessionChanges changes(_localSession->hashes(),
+                                        newLocalSession->hashes());
+      if (changes.HasChanges()) {
         _localSession = std::move(newLocalSession);
         [self applyChanges:changes toCollectionView:collectionView];
       }
     };
     [collectionView performBatchUpdates:updateBlock completion:nil];
   }
 }
 
-- (void)applyChanges:(SessionChanges&)changes
+- (void)applyChanges:(TabSwitcherSessionChanges&)changes
     toCollectionView:(UICollectionView*)collectionView {
   NSMutableArray* deletedIndexes = [NSMutableArray array];
   NSMutableArray* insertedIndexes = [NSMutableArray array];
   NSMutableArray* updatedIndexes = [NSMutableArray array];
   for (size_t i : changes.deletions()) {
     NSInteger deletedTabIndex = static_cast<NSInteger>(i);
     [deletedIndexes
         addObject:[NSIndexPath indexPathForItem:deletedTabIndex inSection:0]];
   }
   for (size_t i : changes.insertions()) {
@@ skipping 169 matching lines @@
   _panelView.reset(
       [[TabSwitcherPanelView alloc] initWithSessionType:_sessionType]);
   _panelView.get().collectionView.dataSource = self;
 }
 
 - (synced_sessions::DistantSession const*)distantSession {
   return _distantSession.get();
 }
 
 @end