Upstream Chrome on iOS source code [2/11].

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 "ios/chrome/browser/browser_state/chrome_browser_state.h"
+#include "ios/chrome/browser/tabs/tab_model.h"
+#import "ios/chrome/browser/tabs/tab_model_synced_window_delegate.h"
+#import "ios/chrome/browser/ui/browser_list_ios.h"
+
+TabModelSyncedWindowDelegatesGetter::TabModelSyncedWindowDelegatesGetter(
+    ios::ChromeBrowserState* browser_state)
+    : browser_state_(browser_state) {}
+
+TabModelSyncedWindowDelegatesGetter::~TabModelSyncedWindowDelegatesGetter() {}
+
+std::set<const sync_sessions::SyncedWindowDelegate*>
+TabModelSyncedWindowDelegatesGetter::GetSyncedWindowDelegates() {
+  std::set<const sync_sessions::SyncedWindowDelegate*> synced_window_delegates;
+
+  for (BrowserListIOS::const_iterator iter = BrowserListIOS::begin();
+       iter != BrowserListIOS::end(); ++iter) {
+    id<BrowserIOS> browser = *iter;
+    TabModel* tabModel = [browser tabModel];
+    // TODO(crbug.com/548612): BrowserState may be unnecessary as iOS does not
+    // support multiple profiles starting with M47. There should still be a way
+    // to filter out Incognito delegates, though.
+    if (tabModel.browserState != browser_state_)
+      continue;
+    // Do not return windows without any tabs, to match desktop.
+    if ([tabModel currentTab])
+      synced_window_delegates.insert([tabModel syncedWindowDelegate]);
+  }
+
+  return synced_window_delegates;
+}
+
+const sync_sessions::SyncedWindowDelegate*
+TabModelSyncedWindowDelegatesGetter::FindById(SessionID::id_type session_id) {
+  for (const sync_sessions::SyncedWindowDelegate* delegate :
+       GetSyncedWindowDelegates()) {
+    if (session_id == delegate->GetSessionId())
+      return delegate;
+  }
+  return nullptr;
+}