Reland v5 of Sessions Refactor

ios/chrome/browser/tabs/tab_model_synced_window_delegate_getter.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.
 
 #include "ios/chrome/browser/tabs/tab_model_synced_window_delegate_getter.h"
 
 #include "base/logging.h"
 #include "ios/chrome/browser/application_context.h"
 #include "ios/chrome/browser/browser_state/chrome_browser_state.h"
 #include "ios/chrome/browser/browser_state/chrome_browser_state_manager.h"
 #import "ios/chrome/browser/tabs/tab_model.h"
 #import "ios/chrome/browser/tabs/tab_model_list.h"
 #import "ios/chrome/browser/tabs/tab_model_synced_window_delegate.h"
 
 TabModelSyncedWindowDelegatesGetter::TabModelSyncedWindowDelegatesGetter() {}
 
 TabModelSyncedWindowDelegatesGetter::~TabModelSyncedWindowDelegatesGetter() {}
 
 std::set<const sync_sessions::SyncedWindowDelegate*>
 TabModelSyncedWindowDelegatesGetter::GetSyncedWindowDelegates() {
-  std::set<const sync_sessions::SyncedWindowDelegate*> synced_window_delegates;
+  SyncedWindowDelegateMap synced_window_delegates;
 
   std::vector<ios::ChromeBrowserState*> browser_states =
       GetApplicationContext()
           ->GetChromeBrowserStateManager()
           ->GetLoadedBrowserStates();
 
   for (auto* browser_state : browser_states) {
     DCHECK(!browser_state->IsOffTheRecord());
     NSArray<TabModel*>* tabModels =
         GetTabModelsForChromeBrowserState(browser_state);
     for (TabModel* tabModel in tabModels) {
       if (tabModel.currentTab) {
-        synced_window_delegates.insert([tabModel syncedWindowDelegate]);
+        synced_window_delegates[tabModel->GetSessionId()] =
+            [tabModel syncedWindowDelegate];
       }
     }
   }
 
   return synced_window_delegates;
 }
 
 const sync_sessions::SyncedWindowDelegate*
 TabModelSyncedWindowDelegatesGetter::FindById(SessionID::id_type session_id) {
   for (const auto* delegate : GetSyncedWindowDelegates()) {
     if (session_id == delegate->GetSessionId())
       return delegate;
   }
   return nullptr;
 }