Local NTP: Deploy strict-dynamic CSP

chrome/browser/search/google_search_provider_service.cc

+// Copyright 2017 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/search/google_search_provider_service.h"
+
+#include "components/search_engines/template_url_service.h"
+
+namespace {
+
+bool DefaultSearchProviderIsGoogleImpl(
+    const TemplateURLService* template_url_service) {
+  if (!template_url_service)
+    return false;
+
+  const TemplateURL* default_provider =
+      template_url_service->GetDefaultSearchProvider();
+  return default_provider && (default_provider->GetEngineType(
+                                  template_url_service->search_terms_data()) ==
+                              SEARCH_ENGINE_GOOGLE);
+}
+
+}  // namespace
+
+GoogleSearchProviderService::GoogleSearchProviderService(
+    TemplateURLService* template_url_service)
+    : template_url_service_(template_url_service),
+      template_url_service_observer_(this),
+      is_google_(false) {
+  if (template_url_service_)
+    template_url_service_observer_.Add(template_url_service_);
+  OnTemplateURLServiceChanged();
+}
+
+GoogleSearchProviderService::~GoogleSearchProviderService() = default;
+
+void GoogleSearchProviderService::Shutdown() {
+  template_url_service_observer_.RemoveAll();
+  for (auto& observer : observers_)
+    observer.OnGoogleSearchProviderServiceShuttingDown();
+}
+
+bool GoogleSearchProviderService::DefaultSearchProviderIsGoogle() const {
+  return is_google_;
+}
+
+void GoogleSearchProviderService::AddObserver(
+    GoogleSearchProviderServiceObserver* observer) {
+  observers_.AddObserver(observer);
+}
+
+void GoogleSearchProviderService::RemoveObserver(
+    GoogleSearchProviderServiceObserver* observer) {
+  observers_.RemoveObserver(observer);
+}
+
+void GoogleSearchProviderService::OnTemplateURLServiceChanged() {
+  bool old_is_google = is_google_;
+  is_google_ = DefaultSearchProviderIsGoogleImpl(template_url_service_);
+  if (is_google_ != old_is_google) {
+    for (auto& observer : observers_)
+      observer.OnDefaultSearchProviderIsGoogleChanged(is_google_);
+  }
+}