Add favicon integration tests for FaviconDriverImpl

components/history/core/browser/history_service.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.
 
 // The history system runs on a background thread so that potentially slow
 // database operations don't delay the browser. This backend processing is
 // represented by HistoryBackend. The HistoryService's job is to dispatch to
 // that thread.
 //
 // Main thread                       History thread
@@ skipping 300 matching lines @@
   // Use base::ThreadTaskRunnerHandler::Get() to get a task runner for
   // the current message loop so that we can forward the call to the method
   // HistoryDBTask::DoneRunOnMainThread() in the correct thread.
   backend_task_runner_->PostTask(
       FROM_HERE, base::Bind(&HistoryBackend::ProcessDBTask, history_backend_,
                             base::Passed(&task),
                             base::ThreadTaskRunnerHandle::Get(), is_canceled));
   return task_id;
 }
 
+bool HistoryService::InitForTest(
+    const HistoryDatabaseParams& history_database_params,
+    scoped_refptr<base::SequencedTaskRunner> task_runner) {
+  return InitWithTaskRunner(/*no_db=*/false, history_database_params,
+                            task_runner);
+}
+
 void HistoryService::FlushForTest(const base::Closure& flushed) {
   backend_task_runner_->PostTaskAndReply(FROM_HERE,
                                          base::Bind(&base::DoNothing), flushed);
 }
 
 void HistoryService::SetOnBackendDestroyTask(const base::Closure& task) {
   DCHECK(backend_task_runner_) << "History service being called after cleanup";
   DCHECK(thread_checker_.CalledOnValidThread());
   ScheduleTask(
       PRIORITY_NORMAL,
@@ skipping 532 matching lines @@
 
   // Join the background thread, if any.
   thread_.reset();
 }
 
 bool HistoryService::Init(
     bool no_db,
     const HistoryDatabaseParams& history_database_params) {
   TRACE_EVENT0("browser,startup", "HistoryService::Init")
   SCOPED_UMA_HISTOGRAM_TIMER("History.HistoryServiceInitTime");
-  DCHECK(thread_checker_.CalledOnValidThread());
-  DCHECK(!backend_task_runner_);
 
   if (thread_) {
     base::Thread::Options options;
     options.timer_slack = base::TIMER_SLACK_MAXIMUM;
     if (!thread_->StartWithOptions(options)) {
       Cleanup();
       return false;
     }
-    backend_task_runner_ = thread_->task_runner();
+    return InitWithTaskRunner(no_db, history_database_params,
+                              thread_->task_runner());
   } else {
-    backend_task_runner_ = base::CreateSequencedTaskRunnerWithTraits(
-        base::TaskTraits()
-            .WithPriority(base::TaskPriority::USER_BLOCKING)
-            .WithShutdownBehavior(base::TaskShutdownBehavior::BLOCK_SHUTDOWN)
-            .MayBlock()
-            .WithBaseSyncPrimitives());
+    return InitWithTaskRunner(
+        no_db, history_database_params,
+        base::CreateSequencedTaskRunnerWithTraits(
+            base::TaskTraits()
+                .WithPriority(base::TaskPriority::USER_BLOCKING)
+                .WithShutdownBehavior(
+                    base::TaskShutdownBehavior::BLOCK_SHUTDOWN)
+                .MayBlock()
+                .WithBaseSyncPrimitives()));
   }
+}
+
+bool HistoryService::InitWithTaskRunner(
+    bool no_db,
+    const HistoryDatabaseParams& history_database_params,
+    scoped_refptr<base::SequencedTaskRunner> task_runner) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  DCHECK(!backend_task_runner_);
+
+  backend_task_runner_ = task_runner;
 
   // Create the history backend.
   scoped_refptr<HistoryBackend> backend(new HistoryBackend(
       new BackendDelegate(weak_ptr_factory_.GetWeakPtr(),
                           base::ThreadTaskRunnerHandle::Get()),
       history_client_ ? history_client_->CreateBackendClient() : nullptr,
       backend_task_runner_));
   history_backend_.swap(backend);
 
   ScheduleTask(PRIORITY_UI,
@@ skipping 247 matching lines @@
   return favicon_changed_callback_list_.Add(callback);
 }
 
 void HistoryService::NotifyFaviconsChanged(const std::set<GURL>& page_urls,
                                            const GURL& icon_url) {
   DCHECK(thread_checker_.CalledOnValidThread());
   favicon_changed_callback_list_.Notify(page_urls, icon_url);
 }
 
 }  // namespace history