cleanup: Use EventRouter instead of ExtensionSystem::Get->event_router()

chrome/browser/extensions/api/automation_internal/automation_internal_api.cc

Index: chrome/browser/extensions/api/automation_internal/automation_internal_api.cc
diff --git a/chrome/browser/extensions/api/automation_internal/automation_internal_api.cc b/chrome/browser/extensions/api/automation_internal/automation_internal_api.cc
index 5e24a8b674b02c28276e127cc2da2d585ce2db09..01b1690594133e299406e554f3e8ab80b8f7e98a 100644
--- a/chrome/browser/extensions/api/automation_internal/automation_internal_api.cc
+++ b/chrome/browser/extensions/api/automation_internal/automation_internal_api.cc
@@ -25,7 +25,6 @@
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/web_contents.h"
 #include "extensions/browser/event_router.h"
-#include "extensions/browser/extension_system.h"
 #include "ui/accessibility/ax_enums.h"
 #include "ui/accessibility/ax_node_data.h"
 
@@ -45,11 +44,15 @@ namespace {
 void DispatchEvent(content::BrowserContext* context,
                    const std::string& event_name,
                    scoped_ptr<base::ListValue> args) {
-  if (context && extensions::ExtensionSystem::Get(context)->event_router()) {
-    scoped_ptr<Event> event(new Event(event_name, args.Pass()));
-    event->restrict_to_browser_context = context;
-    ExtensionSystem::Get(context)->event_router()->BroadcastEvent(event.Pass());
-  }
+  if (!context)

[not at google - send to devlin, 2014/04/17 16:09:46]

the context can't possibly be null here, so you don't need this check.

[limasdf, 2014/04/17 16:22:56]

Done.

+    return;
+  extensions::EventRouter* event_router = extensions::EventRouter::Get(context);
+  if (!event_router)
+    return;
+
+  scoped_ptr<Event> event(new Event(event_name, args.Pass()));
+  event->restrict_to_browser_context = context;
+  event_router->BroadcastEvent(event.Pass());
 }
 
 }  // namespace