Send the decoded size when response completed and stop summing in ResourceLoader::DidReceiveData()

content/common/resource_request_completion_status.h

Index: content/common/resource_request_completion_status.h
diff --git a/content/common/resource_request_completion_status.h b/content/common/resource_request_completion_status.h
index 92e48a864f91f6ac08886dddee355779cab98a19..594119a82a6be88f9a20e4bdc903f3b15fe5046e 100644
--- a/content/common/resource_request_completion_status.h
+++ b/content/common/resource_request_completion_status.h
@@ -36,6 +36,9 @@ struct CONTENT_EXPORT ResourceRequestCompletionStatus {
 
   // The length of the response body before removing any content encodings.
   int64_t encoded_body_length = 0;
+
+  // The length of the response body after decoding.
+  int64_t decoded_body_length = 0;
 };
 
 }  // namespace content