componentize SafeBrowsingService

components/safe_browsing/base_safe_browsing_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.
+
+#include "components/safe_browsing/base_safe_browsing_service.h"
+
+#include <stddef.h>
+
+#include "base/bind.h"
+#include "base/macros.h"
+#include "base/path_service.h"
+#include "components/safe_browsing/base_ui_manager.h"
+#include "components/safe_browsing/common/safebrowsing_constants.h"
+#include "components/safe_browsing_db/database_manager.h"
+#include "components/safe_browsing_db/safe_browsing_prefs.h"
+#include "components/safe_browsing_db/v4_feature_list.h"
+#include "content/public/browser/browser_thread.h"
+#include "content/public/browser/resource_request_info.h"
+#include "google_apis/google_api_keys.h"
+#include "net/url_request/url_request_context.h"
+#include "net/url_request/url_request_context_getter.h"
+
+#if defined(SAFE_BROWSING_DB_REMOTE)
+#include "components/safe_browsing_db/remote_database_manager.h"
+#endif
+
+using content::BrowserThread;
+
+namespace safe_browsing {
+
+BaseSafeBrowsingService::BaseSafeBrowsingService()
+    : enabled_(false),
+      enabled_by_prefs_(false),
+      enabled_v4_only_(safe_browsing::V4FeatureList::IsV4OnlyEnabled()) {}
+
+BaseSafeBrowsingService::~BaseSafeBrowsingService() {
+  // We should have already been shut down. If we're still enabled, then the
+  // database isn't going to be closed properly, which could lead to corruption.
+  DCHECK(!enabled_);
+}
+
+void BaseSafeBrowsingService::Initialize() {
+  // TODO(ntfschr): initialize ui_manager_ once CreateUIManager is componentized

[Jialiu Lin, 2016/12/29 17:41:37]

CreateUIManager can simply return a BaseUIManager for now. 

[Nate Fischer, 2017/01/03 22:39:53]

This is tricky, since other files (e.g. permission_uma_util.cc) depend on
SafeBrowsingService to have a UIManager, not the base class, as a member. Should
I wrap all calls to ui_manager() in dynamic casts, or should I add the necessary
methods (e.g. ReportPermissionAction()) to BaseUIManager?

[Jialiu Lin, 2017/01/04 01:36:34]

Ah, I see. Thanks for your explanation.

+
+  if (!enabled_v4_only_) {
+    database_manager_ = CreateDatabaseManager();
+  }
+}
+
+void BaseSafeBrowsingService::ShutDown() {
+  return;
+}
+
+scoped_refptr<net::URLRequestContextGetter>
+BaseSafeBrowsingService::url_request_context() {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  return nullptr;
+}
+
+const scoped_refptr<SafeBrowsingDatabaseManager>&
+BaseSafeBrowsingService::database_manager() const {
+  return database_manager_;
+}
+
+void BaseSafeBrowsingService::OnResourceRequest(
+    const net::URLRequest* request) {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+}
+
+SafeBrowsingDatabaseManager* BaseSafeBrowsingService::CreateDatabaseManager() {
+#if defined(SAFE_BROWSING_DB_REMOTE)
+  return new RemoteSafeBrowsingDatabaseManager();
+#else
+  return NULL;
+#endif
+}
+
+std::string BaseSafeBrowsingService::GetProtocolConfigClientName() const {

[Jialiu Lin, 2016/12/29 17:41:37]

Since this function is not called in the base class, let's move it to the
subclass. It will also help reduce some dependency.

[Nate Fischer, 2017/01/03 22:39:52]

Done

+  std::string client_name;
+// On Windows, get the safe browsing client name from the browser
+// distribution classes in installer util. These classes don't yet have
+// an analog on non-Windows builds so just keep the name specified here.
+#if defined(OS_WIN)
+  BrowserDistribution* dist = BrowserDistribution::GetDistribution();
+  client_name = dist->GetSafeBrowsingName();
+#else
+#if defined(GOOGLE_CHROME_BUILD)
+  client_name = "googlechrome";
+#else
+  client_name = "chromium";
+#endif
+
+// Mark client string to allow server to differentiate mobile.
+#if defined(OS_ANDROID)
+  client_name.append("-a");
+#endif
+
+#endif  // defined(OS_WIN)
+
+  return client_name;
+}
+
+void BaseSafeBrowsingService::StartOnIOThread(
+    net::URLRequestContextGetter* url_request_context_getter) {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+  if (enabled_)
+    return;
+  enabled_ = true;
+  return;
+}
+
+void BaseSafeBrowsingService::StopOnIOThread(bool shutdown) {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+  return;
+}
+
+void BaseSafeBrowsingService::Start() {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  return;
+}
+
+void BaseSafeBrowsingService::Stop(bool shutdown) {
+  return;
+}
+
+void BaseSafeBrowsingService::Observe(
+    int type,
+    const content::NotificationSource& source,
+    const content::NotificationDetails& details) {
+  return;
+}
+
+std::unique_ptr<BaseSafeBrowsingService::StateSubscription>
+BaseSafeBrowsingService::RegisterStateCallback(
+    const base::Callback<void(void)>& callback) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  return state_callback_list_.Add(callback);
+}
+
+void BaseSafeBrowsingService::RefreshState() {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  return;
+}
+
+void BaseSafeBrowsingService::ProcessResourceRequest(
+    const ResourceRequestInfo& request) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  return;
+}
+
+}  // namespace safe_browsing