Loading: remove dependencies from ResourceFetcher to ImageResource

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

Index: third_party/WebKit/Source/core/fetch/Resource.h
diff --git a/third_party/WebKit/Source/core/fetch/Resource.h b/third_party/WebKit/Source/core/fetch/Resource.h
index 25e4147b2f6ac089314d1b5d89bcaa7df90f667b..da5a7760237a9984c7b9da2d43ee7352288b6ce5 100644
--- a/third_party/WebKit/Source/core/fetch/Resource.h
+++ b/third_party/WebKit/Source/core/fetch/Resource.h
@@ -50,6 +50,7 @@ namespace blink {
 struct FetchInitiatorInfo;
 class FetchRequest;
 class ResourceClient;
+class ResourceFetcher;
 class ResourceTimingInfo;
 class ResourceLoader;
 class SecurityOrigin;
@@ -100,6 +101,13 @@ class CORE_EXPORT Resource : public GarbageCollectedFinalized<Resource>,
     DontMarkAsReferenced,
   };
 
+  // Used by reloadIfLoFiOrPlaceholderImage().
+  enum ReloadLoFiOrPlaceholderPolicy {
+    kReloadIfNeeded,
+    kReloadAlwaysWithExistingCachePolicy,
+    kReloadAlways,
+  };
+
   virtual ~Resource();
 
   DECLARE_VIRTUAL_TRACE();
@@ -332,6 +340,12 @@ class CORE_EXPORT Resource : public GarbageCollectedFinalized<Resource>,
   virtual void onMemoryDump(WebMemoryDumpLevelOfDetail,
                             WebProcessMemoryDump*) const;
 
+  // If this Resource is ImageResource and has the Lo-Fi response headers or is
+  // a placeholder, reload the full original image with the Lo-Fi state set to
+  // off and optionally bypassing the cache.
+  virtual void reloadIfLoFiOrPlaceholderImage(ResourceFetcher*,
+                                              ReloadLoFiOrPlaceholderPolicy) {}
+
   static const char* resourceTypeToString(Type, const FetchInitiatorInfo&);
 
  protected: