[ios] Active web state observer in tab collection.

ios/clean/chrome/browser/ui/tab_collection/tab_collection_view_controller_unittest.mm

 // Copyright 2017 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/clean/chrome/browser/ui/tab_collection/tab_collection_view_controller.h"
 
 #import "ios/clean/chrome/browser/ui/tab_collection/tab_collection_consumer.h"
 #import "ios/clean/chrome/browser/ui/tab_collection/tab_collection_item.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #import "testing/gtest_mac.h"
@@ skipping 22 matching lines @@
     item1.title = @"Item1";
     view_controller_.items = [@[ item0, item1 ] mutableCopy];
   }
 
  protected:
   TestTabCollectionViewController* view_controller_;
 };
 
 // Tests that an item is inserted.
 TEST_F(TabCollectionViewControllerTest, TestInsertItem) {
-  [view_controller_ insertItem:[[TabCollectionItem alloc] init] atIndex:0];
+  [view_controller_ insertItem:[[TabCollectionItem alloc] init]
+                       atIndex:0
+                 selectedIndex:0];
   EXPECT_EQ(3, static_cast<int>(view_controller_.items.count));
 }
 
 // Tests that an item is deleted.
 TEST_F(TabCollectionViewControllerTest, TestDeleteItem) {
-  [view_controller_ deleteItemAtIndex:0];
+  [view_controller_ deleteItemAtIndex:0 selectedIndex:0];
   EXPECT_EQ(1, static_cast<int>(view_controller_.items.count));
 }
 
 // Tests that an item is moved.
 TEST_F(TabCollectionViewControllerTest, TestMoveItem) {
-  [view_controller_ moveItemFromIndex:0 toIndex:1];
+  [view_controller_ moveItemFromIndex:0 toIndex:1 selectedIndex:0];
   EXPECT_NSEQ(@"Item1", view_controller_.items[0].title);
 }
 
 // Tests that an item is replaced.
 TEST_F(TabCollectionViewControllerTest, TestReplaceItem) {
   TabCollectionItem* item = [[TabCollectionItem alloc] init];
   item.title = @"NewItem";
   [view_controller_ replaceItemAtIndex:0 withItem:item];
   EXPECT_NSEQ(@"NewItem", view_controller_.items[0].title);
 }
 
 // Tests that items are initialized.
 TEST_F(TabCollectionViewControllerTest, TestInitializeItems) {
   TabCollectionItem* item = [[TabCollectionItem alloc] init];
   item.title = @"NewItem";
-  [view_controller_ populateItems:@[ item ]];
+  [view_controller_ populateItems:@[ item ] selectedIndex:0];
   EXPECT_NSEQ(@"NewItem", view_controller_.items[0].title);
 }