Coalesce event router Init calls into their constructors.

chrome/browser/bookmarks/bookmark_extension_api.cc

Index: chrome/browser/bookmarks/bookmark_extension_api.cc
diff --git a/chrome/browser/bookmarks/bookmark_extension_api.cc b/chrome/browser/bookmarks/bookmark_extension_api.cc
index 2c8818e01a165fb23d01e624262b3393281ed134..966e1d154ae658b6a02137d3ed792f5a04b1909d 100644
--- a/chrome/browser/bookmarks/bookmark_extension_api.cc
+++ b/chrome/browser/bookmarks/bookmark_extension_api.cc
@@ -137,6 +137,7 @@ void BookmarksFunction::Observe(int type,
 
 BookmarkExtensionEventRouter::BookmarkExtensionEventRouter(
     BookmarkModel* model) : model_(model) {
+  model_->AddObserver(this);
 }
 
 BookmarkExtensionEventRouter::~BookmarkExtensionEventRouter() {
@@ -145,10 +146,6 @@ BookmarkExtensionEventRouter::~BookmarkExtensionEventRouter() {
   }
 }
 
-void BookmarkExtensionEventRouter::Init() {
-  model_->AddObserver(this);
-}
-
 void BookmarkExtensionEventRouter::DispatchEvent(
     Profile* profile,
     const char* event_name,