[Extensions] Make Event::restrict_to_browser_context const.

chrome/browser/chromeos/extensions/ime_menu_event_router.cc

Index: chrome/browser/chromeos/extensions/ime_menu_event_router.cc
diff --git a/chrome/browser/chromeos/extensions/ime_menu_event_router.cc b/chrome/browser/chromeos/extensions/ime_menu_event_router.cc
index 8e5e9924e77e591f00e630cfde99416eb2819bee..19ba2a26e0653e728e080023b7fdb730bce95c5a 100644
--- a/chrome/browser/chromeos/extensions/ime_menu_event_router.cc
+++ b/chrome/browser/chromeos/extensions/ime_menu_event_router.cc
@@ -4,6 +4,7 @@
 
 #include "chrome/browser/chromeos/extensions/ime_menu_event_router.h"
 
+#include "base/memory/ptr_util.h"
 #include "base/values.h"
 #include "chrome/browser/chromeos/extensions/input_method_api.h"
 #include "chrome/common/extensions/api/input_method_private.h"
@@ -40,10 +41,9 @@ void ExtensionImeMenuEventRouter::ImeMenuActivationChanged(bool activation) {
   args->AppendBoolean(activation);
 
   // The router will only send the event to extensions that are listening.
-  std::unique_ptr<extensions::Event> event(new extensions::Event(
+  auto event = base::MakeUnique<extensions::Event>(
       extensions::events::INPUT_METHOD_PRIVATE_ON_IME_MENU_ACTIVATION_CHANGED,
-      OnImeMenuActivationChanged::kEventName, std::move(args)));
-  event->restrict_to_browser_context = context_;
+      OnImeMenuActivationChanged::kEventName, std::move(args), context_);
   router->BroadcastEvent(std::move(event));
 }
 
@@ -56,10 +56,9 @@ void ExtensionImeMenuEventRouter::ImeMenuListChanged() {
   std::unique_ptr<base::ListValue> args(new base::ListValue());
 
   // The router will only send the event to extensions that are listening.
-  std::unique_ptr<extensions::Event> event(new extensions::Event(
+  auto event = base::MakeUnique<extensions::Event>(
       extensions::events::INPUT_METHOD_PRIVATE_ON_IME_MENU_LIST_CHANGED,
-      OnImeMenuListChanged::kEventName, std::move(args)));
-  event->restrict_to_browser_context = context_;
+      OnImeMenuListChanged::kEventName, std::move(args), context_);
   router->BroadcastEvent(std::move(event));
 }
 
@@ -99,10 +98,9 @@ void ExtensionImeMenuEventRouter::ImeMenuItemsChanged(
       OnImeMenuItemsChanged::Create(engine_id, menu_items);
 
   // The router will only send the event to extensions that are listening.
-  std::unique_ptr<extensions::Event> event(new extensions::Event(
+  auto event = base::MakeUnique<extensions::Event>(
       extensions::events::INPUT_METHOD_PRIVATE_ON_IME_MENU_ITEMS_CHANGED,
-      OnImeMenuItemsChanged::kEventName, std::move(args)));
-  event->restrict_to_browser_context = context_;
+      OnImeMenuItemsChanged::kEventName, std::move(args), context_);
   router->BroadcastEvent(std::move(event));
 }