Move notification resource loading from content/child to blink

third_party/WebKit/Source/modules/modules.gypi

 {
   'includes': [
     '../core/core_generated.gypi',
     'modules_generated.gypi',
   ],
   'variables': {
     # Experimental hooks for embedder to provide extra IDL and source files.
     #
     # Note: this is not a supported API. If you rely on this, you will be broken
     # from time to time as the code generator changes in backward incompatible
@@ skipping 1302 matching lines @@
       'nfc/NavigatorNFC.cpp',
       'nfc/NavigatorNFC.h',
       'nfc/NFC.cpp',
       'nfc/NFC.h',
       'notifications/Notification.cpp',
       'notifications/Notification.h',
       'notifications/NotificationData.cpp',
       'notifications/NotificationData.h',
       'notifications/NotificationEvent.cpp',
       'notifications/NotificationEvent.h',
+      'notifications/NotificationImageLoader.cpp',
+      'notifications/NotificationImageLoader.h',
       'notifications/NotificationPermissionCallback.h',
       'notifications/NotificationPermissionClient.cpp',
       'notifications/NotificationPermissionClient.h',
+      'notifications/NotificationResourcesLoader.cpp',
+      'notifications/NotificationResourcesLoader.h',
       'notifications/ServiceWorkerGlobalScopeNotifications.h',
       'notifications/ServiceWorkerRegistrationNotifications.cpp',
       'notifications/ServiceWorkerRegistrationNotifications.h',
       'offscreencanvas/OffscreenCanvas.cpp',
       'offscreencanvas/OffscreenCanvas.h',
       'offscreencanvas/OffscreenCanvasRenderingContext.cpp',
       'offscreencanvas/OffscreenCanvasRenderingContext.h',
       'offscreencanvas/OffscreenCanvasRenderingContextFactory.h',
       'offscreencanvas2d/OffscreenCanvasRenderingContext2D.cpp',
       'offscreencanvas2d/OffscreenCanvasRenderingContext2D.h',
@@ skipping 644 matching lines @@
       'filesystem/DOMFileSystemBaseTest.cpp',
       'indexeddb/IDBKeyPathTest.cpp',
       'indexeddb/IDBRequestTest.cpp',
       'indexeddb/IDBTransactionTest.cpp',
       'indexeddb/MockWebIDBDatabase.cpp',
       'indexeddb/MockWebIDBDatabase.h',
       'mediasession/MediaSessionTest.cpp',
       'mediastream/MediaConstraintsTest.cpp',
       'mediastream/RTCDataChannelTest.cpp',
       'notifications/NotificationDataTest.cpp',
+      'notifications/NotificationResourcesLoaderTest.cpp',
       'payments/PaymentDetailsTestHelper.cpp',
       'payments/PaymentRequestTest.cpp',
       'payments/PaymentRequestDetailsTest.cpp',
       'payments/PaymentResponseTest.cpp',
       'payments/PaymentsValidatorsTest.cpp',
       'payments/ShippingAddressTest.cpp',
       'presentation/PresentationAvailabilityTest.cpp',
       'push_messaging/PushManagerTest.cpp',
       'push_messaging/PushMessageDataTest.cpp',
       'serviceworkers/ServiceWorkerContainerTest.cpp',
       'webaudio/AudioBasicProcessorHandlerTest.cpp',
       'webaudio/ConvolverNodeTest.cpp',
       'webaudio/DynamicsCompressorNodeTest.cpp',
       'webaudio/ScriptProcessorNodeTest.cpp',
       'webaudio/StereoPannerNodeTest.cpp',
       'websockets/DOMWebSocketTest.cpp',
       'websockets/DocumentWebSocketChannelTest.cpp',
     ],
   },
 }