Coalesce event router Init calls into their constructors.

chrome/browser/extensions/api/cookies/cookies_api.cc

Index: chrome/browser/extensions/api/cookies/cookies_api.cc
diff --git a/chrome/browser/extensions/api/cookies/cookies_api.cc b/chrome/browser/extensions/api/cookies/cookies_api.cc
index 29c3adc81478159982d1e1c3fb183622ee74f917..0d9ac3818fadcd872eb1467456c6058faeeae4ab 100644
--- a/chrome/browser/extensions/api/cookies/cookies_api.cc
+++ b/chrome/browser/extensions/api/cookies/cookies_api.cc
@@ -47,18 +47,15 @@ namespace keys = cookies_api_constants;
 
 ExtensionCookiesEventRouter::ExtensionCookiesEventRouter(Profile* profile)
     : profile_(profile) {
-}
-
-ExtensionCookiesEventRouter::~ExtensionCookiesEventRouter() {
-}
-
-void ExtensionCookiesEventRouter::Init() {
   CHECK(registrar_.IsEmpty());
   registrar_.Add(this,
                  chrome::NOTIFICATION_COOKIE_CHANGED,
                  content::NotificationService::AllBrowserContextsAndSources());
 }
 
+ExtensionCookiesEventRouter::~ExtensionCookiesEventRouter() {
+}
+
 void ExtensionCookiesEventRouter::Observe(
     int type,
     const content::NotificationSource& source,