Introduce BookmarkClient interface to abstract embedder

chrome/browser/extensions/api/bookmarks/bookmark_api_helpers_unittest.cc

 // 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 "chrome/browser/extensions/api/bookmarks/bookmark_api_helpers.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
 #include "chrome/browser/bookmarks/bookmark_model.h"
+#include "chrome/browser/bookmarks/test_bookmark_client.h"
 #include "chrome/browser/extensions/api/bookmarks/bookmark_api_constants.h"
 #include "chrome/common/extensions/api/bookmarks.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace extensions {
 
 namespace keys = bookmark_api_constants;
 using api::bookmarks::BookmarkTreeNode;
 
 namespace bookmark_api_helpers {
 
 class ExtensionBookmarksTest : public testing::Test {
  public:
   virtual void SetUp() OVERRIDE {
-    model_.reset(new BookmarkModel(NULL, false));
+    model_ = client_.CreateModel(false);
     model_->AddURL(model_->other_node(), 0, base::ASCIIToUTF16("Digg"),
                      GURL("http://www.reddit.com"));
     model_->AddURL(model_->other_node(), 0, base::ASCIIToUTF16("News"),
                      GURL("http://www.foxnews.com"));
     folder_ = model_->AddFolder(
         model_->other_node(), 0, base::ASCIIToUTF16("outer folder"));
     model_->AddFolder(folder_, 0, base::ASCIIToUTF16("inner folder 1"));
     model_->AddFolder(folder_, 0, base::ASCIIToUTF16("inner folder 2"));
     model_->AddURL(
         folder_, 0, base::ASCIIToUTF16("Digg"), GURL("http://reddit.com"));
     model_->AddURL(
         folder_, 0, base::ASCIIToUTF16("CNet"), GURL("http://cnet.com"));
   }
 
+  test::TestBookmarkClient client_;
   scoped_ptr<BookmarkModel> model_;
   const BookmarkNode* folder_;
 };
 TEST_F(ExtensionBookmarksTest, GetFullTreeFromRoot) {
   scoped_ptr<BookmarkTreeNode> tree(
       GetBookmarkTreeNode(model_->other_node(),
                           true,    // Recurse.
                           false));  // Not only folders.
   ASSERT_EQ(3U, tree->children->size());
 }
@@ skipping 23 matching lines @@
                           true,   // Recurse.
                           true));  // Only folders.
   ASSERT_EQ(2U, tree->children->size());
   linked_ptr<BookmarkTreeNode> inner_folder = tree->children->at(1);
   ASSERT_TRUE(inner_folder.get());
   ASSERT_EQ("inner folder 1", inner_folder->title);
 }
 
 }  // namespace bookmark_api_helpers
 }  // namespace extensions