PlzNavigate: store POST data in the FrameNavigationEntry

content/common/frame_messages.h

Index: content/common/frame_messages.h
diff --git a/content/common/frame_messages.h b/content/common/frame_messages.h
index 31bb2c6e77d0884ad889deb07eac23196d93fdce..1154a73aeffbde5b616b7b8ed11b85be077aba59 100644
--- a/content/common/frame_messages.h
+++ b/content/common/frame_messages.h
@@ -844,11 +844,12 @@ IPC_MESSAGE_ROUTED1(FrameMsg_SelectPopupMenuItem,
 // Tells the renderer that a navigation is ready to commit.  The renderer should
 // request |stream_url| to get access to the stream containing the body of the
 // response.
-IPC_MESSAGE_ROUTED4(FrameMsg_CommitNavigation,
-                    content::ResourceResponseHead,   /* response */
-                    GURL,                            /* stream_url */
-                    content::CommonNavigationParams, /* common_params */
-                    content::RequestNavigationParams /* request_params */)
+IPC_MESSAGE_ROUTED5(FrameMsg_CommitNavigation,
+                    content::ResourceResponseHead,    /* response */
+                    GURL,                             /* stream_url */
+                    content::CommonNavigationParams,  /* common_params */
+                    content::RequestNavigationParams, /* request_params */
+                    scoped_refptr<content::ResourceRequestBody> /* post_data */)
 
 // PlzNavigate
 // Tells the renderer that a navigation failed with the error code |error_code|