Create extensions_test_support build target

chrome/browser/ui/cocoa/extensions/media_galleries_dialog_cocoa_unittest.mm

 // Copyright (c) 2012 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 "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/media_galleries/media_galleries_dialog_controller_mock.h"
 #include "chrome/browser/storage_monitor/storage_info.h"
 #include "chrome/browser/ui/cocoa/extensions/media_galleries_dialog_cocoa.h"
-#include "chrome/common/extensions/extension_test_util.h"
 #include "extensions/common/extension.h"
+#include "extensions/common/test_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using ::testing::_;
 using ::testing::NiceMock;
 using ::testing::Return;
 using ::testing::ReturnPointee;
 using ::testing::ReturnRef;
 
 MediaGalleryPrefInfo MakePrefInfoForTesting(MediaGalleryPrefId pref_id) {
   MediaGalleryPrefInfo gallery;
   gallery.pref_id = pref_id;
   gallery.device_id =
       StorageInfo::MakeDeviceId(StorageInfo::FIXED_MASS_STORAGE,
                                 base::Int64ToString(pref_id));
   gallery.display_name = base::ASCIIToUTF16("name");
   return gallery;
 }
 
 class MediaGalleriesDialogTest : public testing::Test {
  public:
   MediaGalleriesDialogTest() {}
   virtual ~MediaGalleriesDialogTest() {}
   virtual void SetUp() OVERRIDE {
-    dummy_extension_ = extension_test_util::CreateExtensionWithID("dummy");
+    dummy_extension_ = extensions::test_util::CreateExtensionWithID("dummy");
   }
   virtual void TearDown() OVERRIDE {
     dummy_extension_ = NULL;
   }
 
   const extensions::Extension& dummy_extension() const {
     return *dummy_extension_;
   }
 
  private:
@@ skipping 153 matching lines @@
 
   // Remove a gallery.
   attached_permissions.erase(attached_permissions.begin());
   dialog->UpdateGalleries();
   EXPECT_EQ(1U, [dialog->checkboxes_ count]);
 
   // The checkbox container should be shorter.
   CGFloat new_container_height = NSHeight([dialog->checkbox_container_ frame]);
   EXPECT_LT(new_container_height, old_container_height);
 }