Welcome page changes for Windows 10 and over.

chrome/browser/chrome_browser_main.cc

Index: chrome/browser/chrome_browser_main.cc
diff --git a/chrome/browser/chrome_browser_main.cc b/chrome/browser/chrome_browser_main.cc
index b1cfe0b6d89997f4e84d4136827d74d16974ed71..185be5a8f31112898c2835bb8194545ede6b203b 100644
--- a/chrome/browser/chrome_browser_main.cc
+++ b/chrome/browser/chrome_browser_main.cc
@@ -995,6 +995,11 @@ int ChromeBrowserMainParts::PreCreateThreadsImpl() {
           prefs::kBrowserSuppressDefaultBrowserPrompt,
           master_prefs_->suppress_default_browser_prompt_for_version);
     }
+
+#if defined(OS_WIN)
+    if (!master_prefs_->welcome_page_on_os_upgrade_enabled)
+      local_state_->SetBoolean(prefs::kWelcomePageOnOSUpgradeEnabled, false);
+#endif
   }
 #endif  // !defined(OS_ANDROID) && !defined(OS_CHROMEOS)