Introduced StoreKitTabHelper class

ios/chrome/browser/store_kit/BUILD.gn

-# Copyright 2016 The Chromium Authors. All rights reserved.
+# 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.
 
-source_set("itunes_links") {
+source_set("store_kit") {
   configs += [ "//build/config/compiler:enable_arc" ]
   sources = [
-    "itunes_links_observer.h",
-    "itunes_links_observer.mm",
+    "store_kit_launcher.h",
+    "store_kit_tab_helper.h",
+    "store_kit_tab_helper.mm",
   ]
   deps = [
     "//base",
-    "//ios/chrome/browser",
     "//ios/web",
-    "//url",
   ]
 }
 
 source_set("unit_tests") {
+  testonly = true
   configs += [ "//build/config/compiler:enable_arc" ]
-  testonly = true
   sources = [
-    "itunes_links_observer_unittest.mm",
+    "store_kit_tab_helper_unittest.mm",
   ]
   deps = [
-    ":itunes_links",
+    ":store_kit",
     "//base",
-    "//ios/chrome/browser",
+    "//ios/web",
     "//ios/web:test_support",
     "//testing/gtest",
-    "//third_party/ocmock",
-    "//url",
+    "//third_party/ocmock:ocmock",
   ]
 }