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

content/browser/frame_host/navigation_entry_impl.cc

Index: content/browser/frame_host/navigation_entry_impl.cc
diff --git a/content/browser/frame_host/navigation_entry_impl.cc b/content/browser/frame_host/navigation_entry_impl.cc
index 092281a6e51573406cd3598cad582d68b78097c3..e835878fb4933b79deab55badf7c786bf8377206 100644
--- a/content/browser/frame_host/navigation_entry_impl.cc
+++ b/content/browser/frame_host/navigation_entry_impl.cc
@@ -15,6 +15,7 @@
 #include "base/strings/utf_string_conversions.h"
 #include "build/build_config.h"
 #include "components/url_formatter/url_formatter.h"
+#include "content/browser/frame_host/navigation_handle_impl.h"
 #include "content/common/content_constants_internal.h"
 #include "content/common/navigation_params.h"
 #include "content/common/page_state_serialization.h"
@@ -590,17 +591,17 @@ CommonNavigationParams NavigationEntryImpl::ConstructCommonNavigationParams(
       navigation_start, GetHasPostData() ? "POST" : "GET");
 }
 
-StartNavigationParams NavigationEntryImpl::ConstructStartNavigationParams()
-    const {
-  std::vector<unsigned char> browser_initiated_post_data;
-  if (GetBrowserInitiatedPostData()) {
-    browser_initiated_post_data.assign(
-        GetBrowserInitiatedPostData()->front(),
-        GetBrowserInitiatedPostData()->front() +
-            GetBrowserInitiatedPostData()->size());
+StartNavigationParams NavigationEntryImpl::ConstructStartNavigationParams(
+    const NavigationHandleImpl& navigation_handle) const {
+  scoped_refptr<ResourceRequestBody> post_data;
+  if (const base::RefCountedMemory* memory = GetBrowserInitiatedPostData()) {
+    post_data = new ResourceRequestBody();
+    post_data->AppendBytes(memory->front_as<char>(), memory->size());
+  } else {
+    post_data = navigation_handle.resource_request_body();
   }
 
-  return StartNavigationParams(extra_headers(), browser_initiated_post_data,
+  return StartNavigationParams(extra_headers(), post_data,
 #if defined(OS_ANDROID)
                                has_user_gesture(),
 #endif