Phase III Step 1: Make ImageResourceContent manage its own ResourceStatus

third_party/WebKit/Source/platform/loader/fetch/Resource.h

Index: third_party/WebKit/Source/platform/loader/fetch/Resource.h
diff --git a/third_party/WebKit/Source/platform/loader/fetch/Resource.h b/third_party/WebKit/Source/platform/loader/fetch/Resource.h
index d4f70a8ed8fef985aad15988871081d14558e41a..91bee17484698f9f60cc1e8745b3bd6a311916cf 100644
--- a/third_party/WebKit/Source/platform/loader/fetch/Resource.h
+++ b/third_party/WebKit/Source/platform/loader/fetch/Resource.h
@@ -340,6 +340,9 @@ class PLATFORM_EXPORT Resource : public GarbageCollectedFinalized<Resource>,
     return nullptr;
   }
 
+  // Do not cause any JavaScript calls or client/observer notifications.

[kouhei (in TOK), 2017/03/15 11:18:53]

Would you also document what the hook is for?
Also, "JavaScript calls or client/observer notifications are disallowed inside
callback."

[hiroshige, 2017/05/04 20:21:57]

Done.

+  virtual void notifyStartLoad() {}
+
   static const char* resourceTypeToString(
       Type,
       const AtomicString& fetchInitiatorName);