Introduced StoreKitTabHelper class

ios/chrome/browser/itunes_links/itunes_links_observer_unittest.mm

 // Copyright 2016 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 <Foundation/Foundation.h>
 
 #import "ios/chrome/browser/itunes_links/itunes_links_observer.h"
 
-#import "ios/chrome/browser/storekit_launcher.h"
+#import "ios/chrome/browser/store_kit/store_kit_tab_helper.h"
 #import "ios/web/public/test/fakes/test_web_state.h"
 #include "testing/gtest_mac.h"
 #include "testing/platform_test.h"
 #import "third_party/ocmock/OCMock/OCMock.h"
 #import "third_party/ocmock/gtest_support.h"
 #include "url/gurl.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
 namespace {
 
 class ITunesLinksObserverTest : public PlatformTest {
  protected:
   void SetUp() override {
+    StoreKitTabHelper::CreateForWebState(&web_state_);
     mocked_store_kit_launcher_ =
         [OCMockObject mockForProtocol:@protocol(StoreKitLauncher)];
     link_observer_ = [[ITunesLinksObserver alloc] initWithWebState:&web_state_];
     [link_observer_ setStoreKitLauncher:mocked_store_kit_launcher_];
   }
   void VerifyOpeningOfAppStore(NSString* expected_product_id,
                                std::string const& url_string) {
     if (expected_product_id)
       [[mocked_store_kit_launcher_ expect] openAppStore:expected_product_id];
     web_state_.SetCurrentURL(GURL(url_string));
@@ skipping 35 matching lines @@
   VerifyOpeningOfAppStore(@"123", "http://itunes.apple.com/bar/id123");
   VerifyOpeningOfAppStore(@"123", "http://itunes.apple.com/bar/id123?qux");
   VerifyOpeningOfAppStore(@"123", "http://itunes.apple.com/bar/id123?qux&baz");
   VerifyOpeningOfAppStore(@"123",
                           "http://itunes.apple.com/bar/id123?qux&baz#foo");
   VerifyOpeningOfAppStore(@"123",
                           "http://foo.itunes.apple.com/bar/id123?qux&baz#foo");
 }
 
 }  // namespace