Add ExtensionSytem::Get(Profile*) as a wrapper around

chrome/browser/extensions/extension_devtools_bridge.cc

Index: chrome/browser/extensions/extension_devtools_bridge.cc
diff --git a/chrome/browser/extensions/extension_devtools_bridge.cc b/chrome/browser/extensions/extension_devtools_bridge.cc
index 2abf5bdef9de579fc20837f2fb8cfabb8467390e..18b14bc960aac5696ac8f5f3f728f556d258eb12 100644
--- a/chrome/browser/extensions/extension_devtools_bridge.cc
+++ b/chrome/browser/extensions/extension_devtools_bridge.cc
@@ -13,7 +13,6 @@
 #include "chrome/browser/extensions/extension_devtools_manager.h"
 #include "chrome/browser/extensions/extension_event_router.h"
 #include "chrome/browser/extensions/extension_system.h"
-#include "chrome/browser/extensions/extension_system_factory.h"
 #include "chrome/browser/extensions/extension_tab_util.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
@@ -35,7 +34,7 @@ ExtensionDevToolsBridge::ExtensionDevToolsBridge(int tab_id,
       on_tab_close_event_name_(
           ExtensionDevToolsEvents::OnTabCloseEventNameForTab(tab_id)) {
   extension_devtools_manager_ =
-      ExtensionSystemFactory::GetForProfile(profile)->devtools_manager();
+      ExtensionSystem::Get(profile)->devtools_manager();
   DCHECK(extension_devtools_manager_.get());
 }