Phase II Step 3: Reload LoFi/placeholder images via new 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 0f719870af7a6bc608662824d6fbdaba12abfe69..170b82abd6efa1c3fd357d6c6ce81b0e2a9da84d 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;
@@ -107,7 +108,9 @@ class CORE_EXPORT Resource : public GarbageCollectedFinalized<Resource>,
   virtual void setEncoding(const String&) {}
   virtual String encoding() const { return String(); }
   virtual void appendData(const char*, size_t);
-  virtual void error(const ResourceError&);
+  // LoFi images can be reloaded using |fetcherForReload| (if non-null).
+  virtual void error(const ResourceError&,
+                     ResourceFetcher* fetcherForReload = nullptr);
   virtual void setCORSFailed() {}
 
   void setNeedsSynchronousCacheHit(bool needsSynchronousCacheHit) {
@@ -202,7 +205,9 @@ class CORE_EXPORT Resource : public GarbageCollectedFinalized<Resource>,
 
   // Computes the status of an object after loading. Updates the expire date on
   // the cache entry file
-  virtual void finish(double finishTime);
+  // LoFi images can be reloaded using |fetcherForReload| (if non-null).
+  virtual void finish(double finishTime,
+                      ResourceFetcher* fetcherForReload = nullptr);
   void finish() { finish(0.0); }
 
   // FIXME: Remove the stringless variant once all the callsites' error messages
@@ -389,10 +394,6 @@ class CORE_EXPORT Resource : public GarbageCollectedFinalized<Resource>,
     return m_options.dataBufferingPolicy;
   }
 
-  void setCachePolicyBypassingCache();
-  void setLoFiStateOff();
-  void clearRangeRequestHeader();
-
   SharedBuffer* data() const { return m_data.get(); }
   void clearData();