[Extensions] Make Event::restrict_to_browser_context const.

chrome/browser/ui/ash/chrome_keyboard_ui.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/ash/chrome_keyboard_ui.h"
 
 #include <utility>
 
 #include "ash/public/cpp/shell_window_ids.h"
 #include "ash/root_window_controller.h"
@@ skipping 80 matching lines @@
 
     std::unique_ptr<base::ListValue> event_args(new base::ListValue());
     std::unique_ptr<base::DictionaryValue> new_bounds(
         new base::DictionaryValue());
     new_bounds->SetInteger("left", bounds.x());
     new_bounds->SetInteger("top", bounds.y());
     new_bounds->SetInteger("width", bounds.width());
     new_bounds->SetInteger("height", bounds.height());
     event_args->Append(std::move(new_bounds));
 
-    std::unique_ptr<extensions::Event> event(new extensions::Event(
+    auto event = base::MakeUnique<extensions::Event>(
         extensions::events::VIRTUAL_KEYBOARD_PRIVATE_ON_BOUNDS_CHANGED,
         virtual_keyboard_private::OnBoundsChanged::kEventName,
-        std::move(event_args)));
-    event->restrict_to_browser_context = context_;
+        std::move(event_args), context_);
     router->BroadcastEvent(std::move(event));
   }
 
   void OnKeyboardClosed() override {
     extensions::EventRouter* router = extensions::EventRouter::Get(context_);
 
     if (!router->HasEventListener(
             virtual_keyboard_private::OnKeyboardClosed::kEventName)) {
       return;
     }
 
-    std::unique_ptr<extensions::Event> event(new extensions::Event(
+    auto event = base::MakeUnique<extensions::Event>(
         extensions::events::VIRTUAL_KEYBOARD_PRIVATE_ON_KEYBOARD_CLOSED,
         virtual_keyboard_private::OnKeyboardClosed::kEventName,
-        base::WrapUnique(new base::ListValue())));
-    event->restrict_to_browser_context = context_;
+        base::MakeUnique<base::ListValue>(), context_);
     router->BroadcastEvent(std::move(event));
   }
 
  private:
   content::BrowserContext* context_;
 
   DISALLOW_COPY_AND_ASSIGN(AshKeyboardControllerObserver);
 };
 
 }  // namespace
@@ skipping 92 matching lines @@
   }
 
   std::unique_ptr<base::ListValue> event_args(new base::ListValue());
   std::unique_ptr<base::DictionaryValue> input_context(
       new base::DictionaryValue());
   input_context->SetString("type",
                            virtual_keyboard_private::ToString(
                                TextInputTypeToGeneratedInputTypeEnum(type)));
   event_args->Append(std::move(input_context));
 
-  std::unique_ptr<extensions::Event> event(new extensions::Event(
+  auto event = base::MakeUnique<extensions::Event>(
       extensions::events::VIRTUAL_KEYBOARD_PRIVATE_ON_TEXT_INPUT_BOX_FOCUSED,
       virtual_keyboard_private::OnTextInputBoxFocused::kEventName,
-      std::move(event_args)));
-  event->restrict_to_browser_context = browser_context();
+      std::move(event_args), browser_context());
   router->DispatchEventToExtension(kVirtualKeyboardExtensionID,
                                    std::move(event));
 }