Focus on the default browser option when opening the Win10 settings page.

chrome/installer/util/shell_util.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.
 //
 // This file defines functions that integrate Chrome in Windows shell. These
 // functions can be used by Chrome as well as Chrome installer. All of the
 // work is done by the local functions defined in anonymous namespace in
 // this class.
 
 #include "chrome/installer/util/shell_util.h"
 
 #include <windows.h>
 #include <shlobj.h>
 #include <shobjidl.h>
 
 #include <limits>
 #include <string>
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file_enumerator.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/md5.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
+#include "base/metrics/sparse_histogram.h"
 #include "base/path_service.h"
 #include "base/strings/string16.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/synchronization/cancellation_flag.h"
 #include "base/values.h"
 #include "base/win/registry.h"
@@ skipping 673 matching lines @@
 bool LaunchDefaultAppsSettingsModernDialog() {
   base::win::ScopedComPtr<IApplicationActivationManager> activator;
   HRESULT hr = activator.CreateInstance(CLSID_ApplicationActivationManager);
   if (SUCCEEDED(hr)) {
     DWORD pid = 0;
     CoAllowSetForegroundWindow(activator.get(), nullptr);
     hr = activator->ActivateApplication(
         L"windows.immersivecontrolpanel_cw5n1h2txyewy"
         L"!microsoft.windows.immersivecontrolpanel",
         L"page=SettingsPageAppsDefaults", AO_NONE, &pid);
-    return SUCCEEDED(hr);
+    if (SUCCEEDED(hr)) {
+      hr = activator->ActivateApplication(
+          L"windows.immersivecontrolpanel_cw5n1h2txyewy"
+          L"!microsoft.windows.immersivecontrolpanel",
+          L"page=SettingsPageAppsDefaults"
+          L"&target=SystemSettings_DefaultApps_Browser", AO_NONE, &pid);
+    }
+    if (SUCCEEDED(hr))
+      return true;
+    UMA_HISTOGRAM_SPARSE_SLOWLY("DefaultBrowser.ActivateSettings.ErrorHresult",
+                                hr);
   }
   return false;
 }
 
 // Launches the Windows 7 and Windows 8 dialog for picking the application to
 // handle the given protocol. Most importantly, this is used to set the default
 // handler for http (and, implicitly with it, https). In that case it is also
 // known as the 'how do you want to open webpages' dialog.
 // It is required that Chrome be already *registered* for the given protocol.
 bool LaunchSelectDefaultProtocolHandlerDialog(const wchar_t* protocol) {
@@ skipping 1595 matching lines @@
        itr != entries.end(); ++itr)
     (*itr)->AddToWorkItemList(root, items.get());
 
   // Apply all the registry changes and if there is a problem, rollback
   if (!items->Do()) {
     items->Rollback();
     return false;
   }
   return true;
 }