Stop dispatching notifyFinished for each part in a multipart response

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

Index: third_party/WebKit/Source/core/fetch/ImageResource.h
diff --git a/third_party/WebKit/Source/core/fetch/ImageResource.h b/third_party/WebKit/Source/core/fetch/ImageResource.h
index 8baf98c6941a7a27c0017233b7d3eb11e27bd570..f5c4d9a5629bf3c182ecde939cd04d0576ab6351 100644
--- a/third_party/WebKit/Source/core/fetch/ImageResource.h
+++ b/third_party/WebKit/Source/core/fetch/ImageResource.h
@@ -118,7 +118,7 @@ public:
     void changedInRect(const blink::Image*, const IntRect&) override;
 
     // MultipartImageResourceParser::Client
-    void onePartInMultipartReceived(const ResourceResponse&, bool isFirstPart) final;
+    void onePartInMultipartReceived(const ResourceResponse&) final;
     void multipartDataReceived(const char*, size_t) final;
 
     DECLARE_VIRTUAL_TRACE();
@@ -132,6 +132,12 @@ private:
     explicit ImageResource(blink::Image*);
     ImageResource(const ResourceRequest&, blink::Image*);
 
+    enum class MultipartParsingState : uint8_t {
+        WaitingForFirstPart,
+        ParsingFirstPart,
+        FinishedParsingFirstPart,
+    };
+
     class ImageResourceFactory : public ResourceFactory {
     public:
         ImageResourceFactory()
@@ -157,6 +163,7 @@ private:
 
     PersistentWillBeMember<MultipartImageResourceParser> m_multipartParser;
     RefPtr<blink::Image> m_image;
+    MultipartParsingState m_multipartParsingState = MultipartParsingState::WaitingForFirstPart;
     bool m_hasDevicePixelRatioHeaderValue;
 };