network service: Plumbing to get URLLoaderFactory to renderer on nav commit

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 aebe97582a5bcbc7bf8ec4bc6a735c80c8dd4bfa..041a80fd0c01182196a55a5822124b8f16a1cd61 100644
--- a/content/common/frame_messages.h
+++ b/content/common/frame_messages.h
@@ -48,6 +48,7 @@
 #include "content/public/common/three_d_api_types.h"
 #include "ipc/ipc_message_macros.h"
 #include "ipc/ipc_platform_file.h"
+#include "mojo/public/cpp/system/message_pipe.h"
 #include "ppapi/features/features.h"
 #include "third_party/WebKit/public/platform/WebFeaturePolicy.h"
 #include "third_party/WebKit/public/platform/WebFocusType.h"
@@ -626,6 +627,11 @@ IPC_STRUCT_BEGIN(FrameMsg_MixedContentFound_Params)
   IPC_STRUCT_MEMBER(content::SourceLocation, source_location)
 IPC_STRUCT_END()
 
+IPC_STRUCT_BEGIN(FrameMsg_CommitDataNetworkService_Params)
+  IPC_STRUCT_MEMBER(mojo::DataPipeConsumerHandle, handle)
+  IPC_STRUCT_MEMBER(mojo::MessagePipeHandle, url_loader_factory)
+IPC_STRUCT_END()
+
 #if BUILDFLAG(USE_EXTERNAL_POPUP_MENU)
 // This message is used for supporting popup menus on Mac OS X and Android using
 // native controls. See the FrameHostMsg_ShowPopup message.
@@ -913,11 +919,13 @@ IPC_MESSAGE_ROUTED2(FrameMsg_SelectPopupMenuItems,
 // 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. When --enable-network-service is in effect, |stream_url| is not
-// used, and instead the data is passed to the renderer in |handle|.
+// used, and instead the data is passed to the renderer in |commit_data.handle|.
+// When --enable-network-service, a URLLoaderFactory is optionally passed in
+// |commit_data| too.
 IPC_MESSAGE_ROUTED5(FrameMsg_CommitNavigation,
-                    content::ResourceResponseHead,   /* response */
-                    GURL,                            /* stream_url */
-                    mojo::DataPipeConsumerHandle,    /* handle */
+                    content::ResourceResponseHead,            /* response */
+                    GURL,                                     /* stream_url */
+                    FrameMsg_CommitDataNetworkService_Params, /* commit_data */
                     content::CommonNavigationParams, /* common_params */
                     content::RequestNavigationParams /* request_params */)