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

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

Index: third_party/WebKit/Source/core/fetch/ImageResourceContent.h
diff --git a/third_party/WebKit/Source/core/fetch/ImageResourceContent.h b/third_party/WebKit/Source/core/fetch/ImageResourceContent.h
index 15b2bd9841082de580d7905f86cb5420ec7342d1..cf47c4c2c144fa36f93f512015be1c65cae3402c 100644
--- a/third_party/WebKit/Source/core/fetch/ImageResourceContent.h
+++ b/third_party/WebKit/Source/core/fetch/ImageResourceContent.h
@@ -21,6 +21,7 @@
 namespace blink {
 
 class FetchRequest;
+class ImageResource;
 class ImageResourceInfo;
 class ImageResourceObserver;
 class ResourceError;
@@ -107,7 +108,8 @@ class CORE_EXPORT ImageResourceContent final
   enum ClearImageOption { ClearExistingImage, KeepExistingImage };
   void updateImage(PassRefPtr<SharedBuffer>,
                    ClearImageOption,
-                   bool allDataReceived);
+                   bool allDataReceived,
+                   ResourceFetcher* fetcherForReload);
   ResourcePriority priorityFromObservers() const;
   void destroyDecodedData();
   bool hasObservers() const {
@@ -121,6 +123,9 @@ class CORE_EXPORT ImageResourceContent final
   }
   void doResetAnimation();
 
+  // Only for tests.
+  ImageResource* resourceForTest() const;
+
  private:
   ImageResourceContent(PassRefPtr<blink::Image> = nullptr);