Linux native notifications: Add notify and close tests

chrome/browser/notifications/notification_platform_bridge_linux.cc

 // Copyright 2017 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/notifications/notification_platform_bridge_linux.h"
 
 #include <algorithm>
 #include <memory>
 #include <set>
 #include <unordered_map>
@@ skipping 37 matching lines @@
 // added at the end, before NUM_ITEMS.
 enum class ConnectionInitializationStatusCode {
   SUCCESS = 0,
   NATIVE_NOTIFICATIONS_NOT_SUPPORTED = 1,
   MISSING_REQUIRED_CAPABILITIES = 2,
   COULD_NOT_CONNECT_TO_SIGNALS = 3,
   NUM_ITEMS
 };
 
 gfx::Image DeepCopyImage(const gfx::Image& image) {
+  if (image.IsEmpty())
+    return gfx::Image();
   std::unique_ptr<gfx::ImageSkia> image_skia(image.CopyImageSkia());
   return gfx::Image(*image_skia);
 }
 
 int NotificationPriorityToFdoUrgency(int priority) {
   enum FdoUrgency {
     LOW = 0,
     NORMAL = 1,
     CRITICAL = 2,
   };
@@ skipping 666 matching lines @@
 }
 
 void NotificationPlatformBridgeLinux::SetReadyCallback(
     NotificationBridgeReadyCallback callback) {
   impl_->SetReadyCallback(std::move(callback));
 }
 
 void NotificationPlatformBridgeLinux::CleanUp() {
   impl_->CleanUp();
 }