Implement the Windows desktop search redirection feature.

components/search_engines/desktop_search_infobar_delegate_win.cc

+// Copyright 2016 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/search_engines/desktop_search_infobar_delegate_win.h"
+
+#include <vector>
+
+#include "base/logging.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/metrics/histogram_macros.h"
+#include "base/metrics/user_metrics.h"
+#include "base/prefs/pref_service.h"
+#include "components/infobars/core/infobar.h"
+#include "components/infobars/core/infobar_delegate.h"
+#include "components/infobars/core/infobar_manager.h"
+#include "components/search_engines/desktop_search_utils_win.h"
+#include "grit/components_strings.h"
+#include "ui/base/l10n/l10n_util.h"
+#include "ui/base/window_open_disposition.h"
+
+namespace {
+
+// Values for the Search.WindowsDesktopSearch.InfobarAction histogram.
+enum WindowsDesktopSearchInfobarAction {
+  WINDOWS_DESKTOP_SEARCH_INFOBAR_ACTION_MANAGE_SEARCH_SETTINGS = 0,
+  WINDOWS_DESKTOP_SEARCH_INFOBAR_ACTION_DISMISS = 1,
+  WINDOWS_DESKTOP_SEARCH_INFOBAR_ACTION_IGNORE = 2,
+  WINDOWS_DESKTOP_SEARCH_INFOBAR_ACTION_MAX
+};
+
+void RecordWindowsDesktopSearchInfobarActionHistogram(
+    WindowsDesktopSearchInfobarAction action) {
+  DCHECK_LT(action, WINDOWS_DESKTOP_SEARCH_INFOBAR_ACTION_MAX);
+  UMA_HISTOGRAM_ENUMERATION("Search.WindowsDesktopSearch.InfobarAction", action,
+                            WINDOWS_DESKTOP_SEARCH_INFOBAR_ACTION_MAX);
+}
+
+}  // namespace
+
+void WindowsDesktopSearchInfobarDelegate::Show(
+    infobars::InfoBarManager* infobar_manager,
+    const base::string16& default_search_engine_name,
+    const GURL& search_settings_url,
+    PrefService* pref_service) {
+  DCHECK(infobar_manager);
+  infobar_manager->AddInfoBar(
+      infobar_manager->CreateConfirmInfoBar(scoped_ptr<ConfirmInfoBarDelegate>(
+          new WindowsDesktopSearchInfobarDelegate(default_search_engine_name,
+                                                  search_settings_url))));
+  pref_service->SetBoolean(
+      prefs::kWindowsDesktopSearchRedirectionInfobarShownPref, true);

[Peter Kasting, 2016/01/20 03:03:01]

What if the user navigates quickly and never really sees the infobar?  I wonder
if we shouldn't stop showing the infobar until the user has explicitly taken an
action with it at least once.

[fdoray, 2016/01/21 21:02:33]

ainslie@: What do you think? Should we show the infobar until the user has
clicked either the "Manage search settings" or the X button?

+}
+
+WindowsDesktopSearchInfobarDelegate::WindowsDesktopSearchInfobarDelegate(
+    const base::string16& default_search_engine_name,
+    const GURL& search_settings_url)
+    : default_search_engine_name_(default_search_engine_name),
+      search_settings_url_(search_settings_url),
+      closed_by_user_(false) {}
+
+WindowsDesktopSearchInfobarDelegate::~WindowsDesktopSearchInfobarDelegate() {
+  if (!closed_by_user_) {
+    base::RecordAction(base::UserMetricsAction(
+        "WindowsDesktopSearchRedirectionInfoBar_Ignore"));
+    RecordWindowsDesktopSearchInfobarActionHistogram(
+        WINDOWS_DESKTOP_SEARCH_INFOBAR_ACTION_IGNORE);
+  }
+}
+
+base::string16 WindowsDesktopSearchInfobarDelegate::GetMessageText() const {
+  return l10n_util::GetStringFUTF16(
+      IDS_WINDOWS_DESKTOP_SEARCH_REDIRECTION_INFOBAR_MESSAGE,
+      std::vector<base::string16>(1, default_search_engine_name_), nullptr);

[Peter Kasting, 2016/01/20 03:03:01]

Why not just call

  return l10n_util::GetStringFUTF16(
      IDS_WINDOWS_DESKTOP_SEARCH_REDIRECTION_INFOBAR_MESSAGE,
      default_search_engine_name_);

?

[fdoray, 2016/01/21 21:02:33]

Done.

+}
+
+int WindowsDesktopSearchInfobarDelegate::GetButtons() const {
+  return BUTTON_OK;
+}
+
+base::string16 WindowsDesktopSearchInfobarDelegate::GetButtonLabel(
+    InfoBarButton button) const {
+  return l10n_util::GetStringUTF16(
+      IDS_WINDOWS_DESKTOP_SEARCH_REDIRECTION_INFOBAR_BUTTON);
+}
+
+bool WindowsDesktopSearchInfobarDelegate::Accept() {
+  base::RecordAction(base::UserMetricsAction(
+      "WindowsDesktopSearchRedirectionInfoBar_ManageSearchSettings"));
+  RecordWindowsDesktopSearchInfobarActionHistogram(
+      WINDOWS_DESKTOP_SEARCH_INFOBAR_ACTION_MANAGE_SEARCH_SETTINGS);
+  infobar()->owner()->OpenURL(search_settings_url_, NEW_FOREGROUND_TAB);

[Peter Kasting, 2016/01/20 03:03:01]

If we already have a settings page open, will this reuse that tab, or open a
second one?  The latter would be a bug, since we always want to reuse settings
tabs.

[fdoray, 2016/01/21 21:02:33]

Done.

+
+  // Do not close the infobar.

[Peter Kasting, 2016/01/20 03:03:01]

Why?

Also, doesn't this mean we'll always record a "dismissed" or "ignored" tick as
well?  "ignored" in particular seems inaccurate in this case.

[fdoray, 2016/01/21 21:02:33]

Done. Once the user has interacted with the infobar, I agree that it is useless
to keep it visible.

+  return false;
+}
+
+infobars::InfoBarDelegate::InfoBarIdentifier
+WindowsDesktopSearchInfobarDelegate::GetIdentifier() const {
+  return WINDOWS_DESKTOP_SEARCH_INFOBAR_DELEGATE;
+}
+
+void WindowsDesktopSearchInfobarDelegate::InfoBarDismissed() {
+  base::RecordAction(base::UserMetricsAction(
+      "WindowsDesktopSearchRedirectionInfoBar_Dismiss"));
+  RecordWindowsDesktopSearchInfobarActionHistogram(
+      WINDOWS_DESKTOP_SEARCH_INFOBAR_ACTION_DISMISS);
+  closed_by_user_ = true;
+}