Do not show the first-run default browser prompt on Win10.

chrome/browser/ui/startup/default_browser_prompt_win.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 "chrome/browser/ui/startup/default_browser_prompt.h"
 
 #include "base/prefs/pref_service.h"
+#include "base/win/windows_version.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/shell_integration.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "chrome/browser/ui/webui/set_as_default_browser_ui.h"
 #include "components/startup_metric_utils/startup_metric_utils.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_types.h"
 
@@ skipping 45 matching lines @@
   registrar_.RemoveAll();
   SetAsDefaultBrowserUI::Show(profile_, browser);
   delete this;
 }
 
 }  // namespace
 
 namespace chrome {
 
 bool ShowFirstRunDefaultBrowserPrompt(Profile* profile) {
+  // The behavior on Windows 10 is no good at the moment, so do not show the

[msw, 2015/07/10 19:54:03]

nit: This comment doesn't really add value, maybe explain why the behavior is no
good or just remove the comment altogether?

+  // prompt.
+  if (base::win::GetVersion() >= base::win::VERSION_WIN10)
+    return false;
+
   // If the only available mode of setting the default browser requires
   // user interaction, it means this couldn't have been done yet. Therefore,
   // we launch the dialog and inform the caller of it.
   bool show_status =
       (ShellIntegration::CanSetAsDefaultBrowser() ==
        ShellIntegration::SET_DEFAULT_INTERACTIVE) &&
       (ShellIntegration::GetDefaultBrowser() == ShellIntegration::NOT_DEFAULT);
 
   if (show_status) {
     startup_metric_utils::SetNonBrowserUIDisplayed();
     SetMetroBrowserFlowLauncher::LaunchSoon(profile);
   }
 
   return show_status;
 }
 
 }  // namespace chrome