customtabs: Pre-create a renderer in mayLaunchUrl().

chrome/browser/history/android/android_provider_backend_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/history/android/android_provider_backend.h"
 
 #include <vector>
 
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
@@ skipping 245 matching lines @@
   BookmarkModel* bookmark_model_;
   base::MessageLoopForUI message_loop_;
   content::TestBrowserThread ui_thread_;
   content::TestBrowserThread file_thread_;
   scoped_ptr<history::HistoryClient> history_client_;
   scoped_ptr<history::HistoryBackendClient> history_backend_client_;
 
   DISALLOW_COPY_AND_ASSIGN(AndroidProviderBackendTest);
 };
 
+TEST_F(AndroidProviderBackendTest, IgnoreAboutBlank) {
+  GURL url("about:blank");
+  ASSERT_FALSE(history_client_->CanAddURL(url));
+}
+
 TEST_F(AndroidProviderBackendTest, UpdateTables) {
   GURL url1("http://www.cnn.com");
   URLID url_id1 = 0;
   std::vector<VisitInfo> visits1;
   Time last_visited1 = Time::Now() - TimeDelta::FromDays(1);
   Time created1 = last_visited1 - TimeDelta::FromDays(20);
   visits1.push_back(VisitInfo(created1, ui::PAGE_TRANSITION_LINK));
   visits1.push_back(VisitInfo(last_visited1 - TimeDelta::FromDays(1),
                               ui::PAGE_TRANSITION_LINK));
   visits1.push_back(VisitInfo(last_visited1, ui::PAGE_TRANSITION_LINK));
@@ skipping 1879 matching lines @@
                                                  update_args, &update_count));
   // Verify notifications.
   EXPECT_FALSE(notifier_.deleted_details());
   ASSERT_TRUE(notifier_.modified_details());
   ASSERT_EQ(1u, notifier_.modified_details()->size());
   // No favicon will be updated as thumbnail database is missing.
   EXPECT_FALSE(notifier_.favicon_changed());
 }
 
 }  // namespace history