Revert "Reland: URLRequestJob: change ReadRawData contract"

content/browser/appcache/appcache_url_request_job.h

Index: content/browser/appcache/appcache_url_request_job.h
diff --git a/content/browser/appcache/appcache_url_request_job.h b/content/browser/appcache/appcache_url_request_job.h
index 8f51e7b6ebdc4978fe38a7331735a71de1686bee..95a3e18310ed7b9bd44e5ddf59c8f6415826fc8c 100644
--- a/content/browser/appcache/appcache_url_request_job.h
+++ b/content/browser/appcache/appcache_url_request_job.h
@@ -148,7 +148,7 @@ class CONTENT_EXPORT AppCacheURLRequestJob
   net::LoadState GetLoadState() const override;
   bool GetCharset(std::string* charset) override;
   void GetResponseInfo(net::HttpResponseInfo* info) override;
-  int ReadRawData(net::IOBuffer* buf, int buf_size) override;
+  bool ReadRawData(net::IOBuffer* buf, int buf_size, int* bytes_read) override;
 
   // Sets extra request headers for Job types that support request headers.
   // This is how we get informed of range-requests.