Move multipart resource handling to core/fetch (1/2)

content/child/web_url_loader_impl.h

Index: content/child/web_url_loader_impl.h
diff --git a/content/child/web_url_loader_impl.h b/content/child/web_url_loader_impl.h
index 290ad993bf65fccadb958d54d2ad27083c599c05..5475c0b4b0856b0051327b901457ef5edd0339d1 100644
--- a/content/child/web_url_loader_impl.h
+++ b/content/child/web_url_loader_impl.h
@@ -70,6 +70,12 @@ class CONTENT_EXPORT WebURLLoaderImpl
       blink::WebThreadedDataReceiver* threaded_data_receiver) override;
   void setLoadingTaskRunner(blink::WebTaskRunner* loading_task_runner) override;
 
+  // This is a utility function for multipart image resources.
+  static bool ParseAdditionalHeaders(const char* bytes,
+                                     size_t,
+                                     blink::WebURLResponse*,
+                                     size_t* end);
+
  private:
   class Context;
   class RequestPeerImpl;