Moving new First Run to use per-profile value, rather than simply checking IsChromeFirstRun.

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 7e0d96887d9de829c90832771911d876ef902051..70a51bda970dd0c6bdd7c80af9605d14921f96b5 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -1306,6 +1306,11 @@ const char kWebRTCIPHandlingPolicy[] = "webrtc.ip_handling_policy";
 const char kWebRTCUDPPortRange[] = "webrtc.udp_port_range";
 #endif
 
+#if !defined(OS_ANDROID)
+// Whether or not this profile has been shown the Welcome page.
+const char kHasSeenWelcomePage[] = "browser.has_seen_welcome_page";
+#endif
+
 // *************** LOCAL STATE ***************
 // These are attached to the machine/installation