Add UpdateNotificationSize to MessageCenterController.

ui/message_center/views/custom_notification_view_unittest.cc

 // Copyright 2016 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 <memory>
 
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 128 matching lines @@
                                  int button_index) override {
     // For this test, this method should not be invoked.
     NOTREACHED();
   }
 
   void ClickOnSettingsButton(const std::string& notification_id) override {
     // For this test, this method should not be invoked.
     NOTREACHED();
   }
 
+  void UpdateNotificationSize(const std::string& notification_id) override {
+    // For this test, this method should not be invoked.
+    NOTREACHED();
+  }
+
   bool IsRemoved(const std::string& notification_id) const {
     return (removed_ids_.find(notification_id) != removed_ids_.end());
   }
 
  private:
   std::set<std::string> removed_ids_;
 
   DISALLOW_COPY_AND_ASSIGN(TestMessageCenterController);
 };
 
@@ skipping 204 matching lines @@
   text_input_client.set_text_input_type(ui::TEXT_INPUT_TYPE_TEXT);
 
   EXPECT_FALSE(controller()->IsRemoved(notification_id));
   PerformKeyEvents(ui::VKEY_BACK);
   EXPECT_FALSE(controller()->IsRemoved(notification_id));
 
   input_method->SetFocusedTextInputClient(nullptr);
 }
 
 }  // namespace message_center