Phase II Step 3: Reload LoFi/placeholder images via new ImageResource

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/heap/Heap.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 {
  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 shouldReloadBrokenPlaceholder() const = 0;
   virtual bool isAccessAllowed(
       SecurityOrigin*,
       bool doesCurrentFrameHasSingleSecurityOrigin) const = 0;
   virtual bool hasCacheControlNoStoreHeader() const = 0;
   virtual const ResourceError& resourceError() const = 0;
 
+  // Only for tests.
+  virtual ImageResource* resourceForTest() 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) {}
+  // Returns true if reloading is started.
+  virtual bool reloadIfLoFiOrPlaceholder(ResourceFetcher* fetcherForReload) {
+    return false;
+  }
 };
 
 }  // namespace blink
 
 #endif