Remove SupportsUserData from ResourceRequestBodyImpl.

content/browser/loader/navigation_url_loader_network_service.cc

Index: content/browser/loader/navigation_url_loader_network_service.cc
diff --git a/content/browser/loader/navigation_url_loader_network_service.cc b/content/browser/loader/navigation_url_loader_network_service.cc
index e4bba52cd3624bcd072a00ac7ff9cdf940bb174c..ee4ae28b3a6ed894f6e85ebcf6408a46b36f28b0 100644
--- a/content/browser/loader/navigation_url_loader_network_service.cc
+++ b/content/browser/loader/navigation_url_loader_network_service.cc
@@ -100,8 +100,8 @@ class NavigationURLLoaderNetworkService::URLLoaderRequestController
                                            : RESOURCE_TYPE_SUB_FRAME;
 
     if (resource_request_->request_body) {
-      AttachRequestBodyBlobDataHandles(resource_request_->request_body.get(),
-                                       resource_context_);
+      blob_handles_ = GetBodyBlobDataHandles(
+          resource_request_->request_body.get(), resource_context_);
     }
 
     // Requests to WebUI scheme won't get redirected to/from other schemes
@@ -272,13 +272,15 @@ class NavigationURLLoaderNetworkService::URLLoaderRequestController
 
   std::unique_ptr<ThrottlingURLLoader> url_loader_;
 
-  // This is referenced only on the UI thread.
-  base::WeakPtr<NavigationURLLoaderNetworkService> owner_;
+  std::unique_ptr<BlobHandles> blob_handles_;
 
   // Currently used by the AppCache loader to pass its factory to the
   // renderer which enables it to handle subresources.
   mojom::URLLoaderFactoryPtrInfo subresource_url_loader_factory_ptr_info_;
 
+  // This is referenced only on the UI thread.
+  base::WeakPtr<NavigationURLLoaderNetworkService> owner_;
+
   DISALLOW_COPY_AND_ASSIGN(URLLoaderRequestController);
 };