Forwarding POST body into renderer after a cross-site transfer.

content/common/navigation_params.h

Index: content/common/navigation_params.h
diff --git a/content/common/navigation_params.h b/content/common/navigation_params.h
index d2f83e756c13622554047902bcdc63d4c24c164b..a38e5c89b974c7fb9bbfcaefc1a4a956d54db8e9 100644
--- a/content/common/navigation_params.h
+++ b/content/common/navigation_params.h
@@ -9,10 +9,12 @@
 
 #include <string>
 
+#include "base/memory/ref_counted.h"
 #include "base/time/time.h"
 #include "build/build_config.h"
 #include "content/common/content_export.h"
 #include "content/common/frame_message_enums.h"
+#include "content/common/resource_request_body.h"
 #include "content/public/common/page_state.h"
 #include "content/public/common/referrer.h"
 #include "content/public/common/request_context_type.h"
@@ -172,23 +174,21 @@ struct CONTENT_EXPORT BeginNavigationParams {
 // PlzNavigate: These are not used.
 struct CONTENT_EXPORT StartNavigationParams {
   StartNavigationParams();
-  StartNavigationParams(
-      const std::string& extra_headers,
-      const std::vector<unsigned char>& browser_initiated_post_data,
+  StartNavigationParams(const std::string& extra_headers,
+                        const scoped_refptr<ResourceRequestBody>& post_data,
 #if defined(OS_ANDROID)
-      bool has_user_gesture,
+                        bool has_user_gesture,
 #endif
-      int transferred_request_child_id,
-      int transferred_request_request_id);
+                        int transferred_request_child_id,
+                        int transferred_request_request_id);
   StartNavigationParams(const StartNavigationParams& other);
   ~StartNavigationParams();
 
   // Extra headers (separated by \n) to send during the request.
   std::string extra_headers;
 
-  // If is_post is true, holds the post_data information from browser. Empty
-  // otherwise.
-  std::vector<unsigned char> browser_initiated_post_data;
+  // Body of HTTP POST request.
+  scoped_refptr<ResourceRequestBody> post_data;
 
 #if defined(OS_ANDROID)
   bool has_user_gesture;