Add an experiment for the default browser infobar on Windows 10

chrome/browser/ui/startup/default_browser_infobar_delegate.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 "chrome/browser/ui/startup/default_browser_infobar_delegate.h"
+
+#include "base/metrics/histogram_macros.h"
+#include "base/threading/thread_task_runner_handle.h"
+#include "chrome/browser/ui/startup/default_browser_prompt.h"
+#include "chrome/grit/chromium_strings.h"
+#include "chrome/grit/generated_resources.h"
+#include "components/infobars/core/infobar.h"
+#include "content/public/browser/user_metrics.h"
+#include "grit/theme_resources.h"
+#include "ui/base/l10n/l10n_util.h"
+#include "ui/gfx/vector_icons_public.h"
+
+#if defined(OS_WIN)
+#include "base/win/windows_version.h"
+#endif
+
+namespace chrome {
+
+const base::Feature kStickyDefaultBrowserPrompt{
+    "StickyDefaultBrowserPrompt", base::FEATURE_DISABLED_BY_DEFAULT};
+
+bool IsStickyDefaultBrowserPromptEnabled() {
+#if defined(OS_WIN)
+  // The flow to set the default browser is only asynchronous on Windows 10+.
+  return base::win::GetVersion() >= base::win::VERSION_WIN10 &&
+         base::FeatureList::IsEnabled(kStickyDefaultBrowserPrompt);
+#else
+  return false;
+#endif
+}
+
+// static
+void DefaultBrowserInfoBarDelegate::Create(InfoBarService* infobar_service,
+                                           Profile* profile) {
+  infobar_service->AddInfoBar(infobar_service->CreateConfirmInfoBar(
+      std::unique_ptr<ConfirmInfoBarDelegate>(
+          new DefaultBrowserInfoBarDelegate(profile))));
+}
+
+DefaultBrowserInfoBarDelegate::DefaultBrowserInfoBarDelegate(Profile* profile)
+    : ConfirmInfoBarDelegate(), profile_(profile), weak_factory_(this) {
+  // We want the info-bar to stick-around for few seconds and then be hidden
+  // on the next navigation after that.
+  base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
+      FROM_HERE, base::Bind(&DefaultBrowserInfoBarDelegate::AllowExpiry,
+                            weak_factory_.GetWeakPtr()),
+      base::TimeDelta::FromSeconds(8));
+}
+
+DefaultBrowserInfoBarDelegate::~DefaultBrowserInfoBarDelegate() = default;
+
+infobars::InfoBarDelegate::Type DefaultBrowserInfoBarDelegate::GetInfoBarType()
+    const {
+#if defined(OS_WIN)
+  return WARNING_TYPE;
+#else
+  return PAGE_ACTION_TYPE;
+#endif
+}
+
+infobars::InfoBarDelegate::InfoBarIdentifier
+DefaultBrowserInfoBarDelegate::GetIdentifier() const {
+  return DEFAULT_BROWSER_INFOBAR_DELEGATE;
+}
+
+int DefaultBrowserInfoBarDelegate::GetIconId() const {
+  return IDR_PRODUCT_LOGO_32;
+}
+
+gfx::VectorIconId DefaultBrowserInfoBarDelegate::GetVectorIconId() const {
+#if defined(OS_MACOSX) || defined(OS_ANDROID)
+  return gfx::VectorIconId::VECTOR_ICON_NONE;
+#else
+  return gfx::VectorIconId::CHROME_PRODUCT;
+#endif
+}
+
+bool DefaultBrowserInfoBarDelegate::ShouldExpire(
+    const NavigationDetails& details) const {
+  return should_expire_ && ConfirmInfoBarDelegate::ShouldExpire(details);
+}
+
+void DefaultBrowserInfoBarDelegate::InfoBarDismissed() {
+  content::RecordAction(
+      base::UserMetricsAction("DefaultBrowserInfoBar_Dismiss"));
+  UMA_HISTOGRAM_ENUMERATION("DefaultBrowser.InfoBar.UserInteraction",
+                            IGNORE_INFO_BAR,
+                            NUM_INFO_BAR_USER_INTERACTION_TYPES);
+}
+
+base::string16 DefaultBrowserInfoBarDelegate::GetMessageText() const {
+  return l10n_util::GetStringUTF16(IDS_DEFAULT_BROWSER_INFOBAR_SHORT_TEXT);
+}
+
+base::string16 DefaultBrowserInfoBarDelegate::GetButtonLabel(
+    InfoBarButton button) const {
+#if defined(OS_WIN)
+  // On Windows 10, the "OK" button opens the Windows Settings application,
+  // through which the user must make their default browser choice.
+  const int kSetAsDefaultButtonMessageId =
+      base::win::GetVersion() >= base::win::VERSION_WIN10
+          ? IDS_DEFAULT_BROWSER_INFOBAR_OK_BUTTON_LABEL_WIN_10
+          : IDS_DEFAULT_BROWSER_INFOBAR_OK_BUTTON_LABEL;
+#else
+  const int kSetAsDefaultButtonMessageId =
+      IDS_DEFAULT_BROWSER_INFOBAR_OK_BUTTON_LABEL;
+#endif
+  return l10n_util::GetStringUTF16(
+      button == BUTTON_OK ? kSetAsDefaultButtonMessageId
+                          : IDS_DEFAULT_BROWSER_INFOBAR_CANCEL_BUTTON_LABEL);
+}
+
+// Setting an app as the default browser doesn't require elevation directly, but
+// it does require registering it as the protocol handler for "http", so if
+// protocol registration in general requires elevation, this does as well.
+bool DefaultBrowserInfoBarDelegate::OKButtonTriggersUACPrompt() const {
+  return shell_integration::IsElevationNeededForSettingDefaultProtocolClient();
+}
+
+bool DefaultBrowserInfoBarDelegate::Accept() {
+  content::RecordAction(
+      base::UserMetricsAction("DefaultBrowserInfoBar_Accept"));
+  UMA_HISTOGRAM_ENUMERATION("DefaultBrowser.InfoBar.UserInteraction",
+                            ACCEPT_INFO_BAR,
+                            NUM_INFO_BAR_USER_INTERACTION_TYPES);
+
+  bool close_infobar = true;
+  shell_integration::DefaultWebClientWorkerCallback set_as_default_callback;
+
+  if (IsStickyDefaultBrowserPromptEnabled()) {
+    // When the experiment is enabled, the infobar is only closed when the
+    // DefaultBrowserWorker is finished.
+    set_as_default_callback =
+        base::Bind(&DefaultBrowserInfoBarDelegate::OnSetAsDefaultFinished,
+                   weak_factory_.GetWeakPtr());
+    close_infobar = false;
+  }
+
+  // The worker pointer is reference counted. While it is running, the
+  // message loops of the FILE and UI thread will hold references to it
+  // and it will be automatically freed once all its tasks have finished.
+  CreateDefaultBrowserWorker(set_as_default_callback)->StartSetAsDefault();
+  return close_infobar;
+}
+
+bool DefaultBrowserInfoBarDelegate::Cancel() {
+  // This can get reached in tests where profile_ is null.
+  if (profile_)
+    chrome::DefaultBrowserPromptDeclined(profile_);
+  content::RecordAction(
+      base::UserMetricsAction("DefaultBrowserInfoBar_Cancel"));
+  UMA_HISTOGRAM_ENUMERATION("DefaultBrowser.InfoBar.UserInteraction",
+                            CANCEL_INFO_BAR,
+                            NUM_INFO_BAR_USER_INTERACTION_TYPES);
+  return true;
+}
+
+scoped_refptr<shell_integration::DefaultBrowserWorker>
+DefaultBrowserInfoBarDelegate::CreateDefaultBrowserWorker(
+    const shell_integration::DefaultWebClientWorkerCallback& callback) {
+  return new shell_integration::DefaultBrowserWorker(callback);
+}
+
+void DefaultBrowserInfoBarDelegate::OnSetAsDefaultFinished(
+    shell_integration::DefaultWebClientState state) {
+  infobar()->owner()->RemoveInfoBar(infobar());
+}
+
+}  // namespace chrome