Using ResourceRequestBody as the type of HTTP body outside of //content.

content/shell/browser/shell.cc

Index: content/shell/browser/shell.cc
diff --git a/content/shell/browser/shell.cc b/content/shell/browser/shell.cc
index c6cf3527723445d821faaf5d7219d942f6f27210..ecb85f67dad9fe681e41e41d97172bf10bd265c3 100644
--- a/content/shell/browser/shell.cc
+++ b/content/shell/browser/shell.cc
@@ -325,12 +325,9 @@ WebContents* Shell::OpenURLFromTab(WebContents* source,
   load_url_params.should_replace_current_entry =
       params.should_replace_current_entry;
 
-  // Only allows the browser-initiated navigation to use POST.
-  if (params.uses_post && !params.is_renderer_initiated) {
-    load_url_params.load_type =
-        NavigationController::LOAD_TYPE_BROWSER_INITIATED_HTTP_POST;
-    load_url_params.browser_initiated_post_data =
-        params.browser_initiated_post_data;
+  if (params.uses_post) {
+    load_url_params.load_type = NavigationController::LOAD_TYPE_HTTP_POST;
+    load_url_params.post_data = params.post_data;
   }
 
   source->GetController().LoadURLWithParams(load_url_params);