Implement Win 10 onboarding content logic

chrome/common/pref_names.cc

Index: chrome/common/pref_names.cc
diff --git a/chrome/common/pref_names.cc b/chrome/common/pref_names.cc
index 7d2abe57c76f751a9c11e8872d67d1b8939c84d4..769995a3b9601db27684d4cc74c771915ccf78e3 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -1313,6 +1313,11 @@ const char kWebRTCUDPPortRange[] = "webrtc.udp_port_range";
 const char kHasSeenWelcomePage[] = "browser.has_seen_welcome_page";
 #endif
 
+#if defined(OS_WIN)
+// Whether or not this profile has been shown the Win10 promo page.
+const char kHasSeenWin10PromoPage[] = "browser.has_seen_win10_promo_page";
+#endif
+
 // *************** LOCAL STATE ***************
 // These are attached to the machine/installation