ResourceFetcher: Add POST support and the ability to set headers

chrome/renderer/net/net_error_helper.cc

Index: chrome/renderer/net/net_error_helper.cc
===================================================================
--- chrome/renderer/net/net_error_helper.cc	(revision 244611)
+++ chrome/renderer/net/net_error_helper.cc	(working copy)
@@ -173,12 +173,13 @@
     return;
   blink::WebFrame* frame = web_view->mainFrame();
 
-  alt_error_page_fetcher_.reset(
-      content::ResourceFetcher::Create(
-          url, frame, blink::WebURLRequest::TargetIsMainFrame,
-          base::Bind(&NetErrorHelper::OnAlternateErrorPageRetrieved,
-                     base::Unretained(this))));
+  alt_error_page_fetcher_.reset(content::ResourceFetcher::Create(url));
 
+  alt_error_page_fetcher_->Start(
+      frame, blink::WebURLRequest::TargetIsMainFrame,
+      base::Bind(&NetErrorHelper::OnAlternateErrorPageRetrieved,
+                     base::Unretained(this)));
+
   alt_error_page_fetcher_->SetTimeout(
       base::TimeDelta::FromSeconds(kAlterErrorPageFetchTimeoutSec));
 }