Navigation transitions (web to native app): Pass data after starting provisional load (Chrome side)

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 6c0a1dfe334b7bb063be81580683013e3abd0472..753285846ece9377bd0e0b9ebd16ef5a97f359d0 100644
--- a/content/common/frame_messages.h
+++ b/content/common/frame_messages.h
@@ -19,6 +19,7 @@
 #include "content/public/common/javascript_message_type.h"
 #include "content/public/common/page_state.h"
 #include "content/public/common/resource_response.h"
+#include "content/public/common/transition_element.h"
 #include "ipc/ipc_message_macros.h"
 #include "ui/gfx/ipc/gfx_param_traits.h"
 #include "url/gurl.h"
@@ -89,6 +90,19 @@ IPC_STRUCT_TRAITS_BEGIN(content::CustomContextMenuContext)
   IPC_STRUCT_TRAITS_MEMBER(link_followed)
 IPC_STRUCT_TRAITS_END()
 
+IPC_STRUCT_TRAITS_BEGIN(content::TransitionElement)
+  IPC_STRUCT_TRAITS_MEMBER(name)
+  IPC_STRUCT_TRAITS_MEMBER(rect)
+IPC_STRUCT_TRAITS_END()
+
+IPC_STRUCT_BEGIN(FrameHostMsg_AddNavigationTransitionData_Params)
+  IPC_STRUCT_MEMBER(int, render_frame_id)
+  IPC_STRUCT_MEMBER(std::string, allowed_destination_host_pattern)
+  IPC_STRUCT_MEMBER(std::string, selector)
+  IPC_STRUCT_MEMBER(std::string, markup)
+  IPC_STRUCT_MEMBER(std::vector<content::TransitionElement>, elements)
+IPC_STRUCT_END()
+
 IPC_STRUCT_BEGIN(FrameHostMsg_DidFailProvisionalLoadWithError_Params)
   // Error code as reported in the DidFailProvisionalLoad callback.
   IPC_STRUCT_MEMBER(int, error_code)
@@ -262,15 +276,6 @@ IPC_STRUCT_BEGIN(FrameMsg_Navigate_Params)
   IPC_STRUCT_MEMBER(std::string, frame_to_navigate)
 IPC_STRUCT_END()
 
-IPC_STRUCT_BEGIN(FrameHostMsg_AddNavigationTransitionData_Params)
-  IPC_STRUCT_MEMBER(int, render_frame_id)
-  IPC_STRUCT_MEMBER(std::string, allowed_destination_host_pattern)
-  IPC_STRUCT_MEMBER(std::string, selector)
-  IPC_STRUCT_MEMBER(std::string, markup)
-  IPC_STRUCT_MEMBER(std::vector<std::string>, names)
-  IPC_STRUCT_MEMBER(std::vector<gfx::Rect>, rects)
-IPC_STRUCT_END()
-
 IPC_STRUCT_BEGIN(FrameHostMsg_OpenURL_Params)
   IPC_STRUCT_MEMBER(GURL, url)
   IPC_STRUCT_MEMBER(content::Referrer, referrer)