Coalesce event router Init calls into their constructors.

chrome/browser/extensions/api/management/management_api.cc

Index: chrome/browser/extensions/api/management/management_api.cc
diff --git a/chrome/browser/extensions/api/management/management_api.cc b/chrome/browser/extensions/api/management/management_api.cc
index 4cd3a39db1100a79061f7ea82c509fb40ce9ade6..cad2abfb9eb30b21e738d45aea7650d08191d36a 100644
--- a/chrome/browser/extensions/api/management/management_api.cc
+++ b/chrome/browser/extensions/api/management/management_api.cc
@@ -583,11 +583,7 @@ void UninstallFunction::ExtensionUninstallCanceled() {
 }
 
 ExtensionManagementEventRouter::ExtensionManagementEventRouter(Profile* profile)
-    : profile_(profile) {}
-
-ExtensionManagementEventRouter::~ExtensionManagementEventRouter() {}
-
-void ExtensionManagementEventRouter::Init() {
+    : profile_(profile) {
   int types[] = {
     chrome::NOTIFICATION_EXTENSION_INSTALLED,
     chrome::NOTIFICATION_EXTENSION_UNINSTALLED,
@@ -603,6 +599,8 @@ void ExtensionManagementEventRouter::Init() {
   }
 }
 
+ExtensionManagementEventRouter::~ExtensionManagementEventRouter() {}
+
 void ExtensionManagementEventRouter::Observe(
     int type,
     const content::NotificationSource& source,