[ImageResource 4] Split ImageResource into Resource and Image parts

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

Index: third_party/WebKit/Source/core/fetch/ImageResourceContentInterface.h
diff --git a/third_party/WebKit/Source/core/fetch/ImageResourceContentInterface.h b/third_party/WebKit/Source/core/fetch/ImageResourceContentInterface.h
new file mode 100644
index 0000000000000000000000000000000000000000..69f85bb05a6a64ffecf07a6af2f73fdc5ca39f31
--- /dev/null
+++ b/third_party/WebKit/Source/core/fetch/ImageResourceContentInterface.h
@@ -0,0 +1,39 @@
+// 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 ImageResourceContentInterface_h
+#define ImageResourceContentInterface_h
+
+#include "core/CoreExport.h"
+#include "platform/graphics/Image.h"
+#include "platform/network/ResourceLoadPriority.h"
+
+namespace blink {
+
+class ImageResourceInfo;
+
+// Interface of ImageResourceContent visible to ImageResource.
+class CORE_EXPORT ImageResourceContentInterface : public GarbageCollectedMixin {
+ public:
+  enum ClearImageOption { ClearExistingImage, KeepExistingImage };
+
+  virtual void setImageResourceInfo(ImageResourceInfo*) = 0;
+  virtual void updateImage(PassRefPtr<SharedBuffer>,
+                           ClearImageOption,
+                           bool allDataReceived) = 0;
+  virtual void destroyDecodedData() = 0;
+  virtual void doResetAnimation() = 0;
+
+  virtual ResourcePriority priorityFromObservers() const = 0;
+  virtual bool hasObservers() const = 0;
+  virtual bool isSizeAvailable() const = 0;
+  virtual bool isRefetchableDataFromDiskCache() const = 0;
+  virtual blink::Image* getImage() const = 0;
+  virtual bool hasImage() const = 0;
+  DEFINE_INLINE_VIRTUAL_TRACE() {}
+};
+
+}  // namespace blink
+
+#endif