[ImageResource 4] Split ImageResource into Resource and Image parts

third_party/WebKit/Source/core/fetch/ImageResourceInfo.h

+// 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.
+
+#ifndef ImageResourceInfo_h
+#define ImageResourceInfo_h
+
+#include "core/CoreExport.h"
+#include "core/fetch/ResourceStatus.h"
+#include "platform/weborigin/KURL.h"
+
+namespace blink {
+
+class ResourceError;
+class ResourceFetcher;
+class ResourceResponse;
+class SecurityOrigin;
+
+// Delegate class of ImageResource that encapsulates the interface and data
+// visible to ImageResourceContent.
+// TODO(hiroshige): reduce the members of this class to further decouple
+// ImageResource and ImageResourceContent.
+class CORE_EXPORT ImageResourceInfo : public GarbageCollectedMixin {

[kinuko, 2016/12/01 16:40:56]

ImageResourceView... or ImageResourceAccessor or something?  I don't have a
great idea but this name feels more like something that is a simple struct held
by ImageResource.

+ public:
+  ~ImageResourceInfo() {}
+  virtual const KURL& url() const = 0;
+  virtual bool isSchedulingReload() const = 0;
+  virtual bool hasDevicePixelRatioHeaderValue() const = 0;
+  virtual float devicePixelRatioHeaderValue() const = 0;
+  virtual const ResourceResponse& response() const = 0;
+  virtual ResourceStatus getStatus() const = 0;
+  virtual bool isPlaceholder() const = 0;
+  virtual bool isCacheValidator() const = 0;
+  virtual bool schedulingReloadOrShouldReloadBrokenPlaceholder() const = 0;
+  virtual bool isAccessAllowed(
+      SecurityOrigin*,
+      bool doesCurrentFrameHasSingleSecurityOrigin) const = 0;
+  virtual bool hasCacheControlNoStoreHeader() const = 0;
+  virtual const ResourceError& resourceError() const = 0;
+
+  DEFINE_INLINE_VIRTUAL_TRACE() {}
+
+  virtual void decodeError(bool allDataReceived) {}
+  virtual void setDecodedSize(size_t) {}
+  virtual void willAddClientOrObserver() {}
+  virtual void didRemoveClientOrObserver() {}
+  virtual void emulateLoadStartedForInspector(
+      ResourceFetcher*,
+      const KURL&,
+      const AtomicString& initiatorName) {}
+};
+
+}  // namespace blink
+
+#endif