Consistently use LoFi for an entire page

content/common/resource_messages.h

Index: content/common/resource_messages.h
diff --git a/content/common/resource_messages.h b/content/common/resource_messages.h
index 744a9235ced196aae80b75c0d16da92d88c45724..dc4bac428bb158f1c46157326a52c6384466602e 100644
--- a/content/common/resource_messages.h
+++ b/content/common/resource_messages.h
@@ -10,6 +10,7 @@
 #include "base/memory/shared_memory.h"
 #include "base/process/process.h"
 #include "content/common/content_param_traits_macros.h"
+#include "content/common/navigation_params.h"
 #include "content/common/resource_request_body.h"
 #include "content/common/service_worker/service_worker_types.h"
 #include "content/public/common/common_param_traits.h"
@@ -135,6 +136,7 @@ IPC_STRUCT_TRAITS_BEGIN(content::ResourceResponseInfo)
   IPC_STRUCT_TRAITS_MEMBER(service_worker_start_time)
   IPC_STRUCT_TRAITS_MEMBER(service_worker_ready_time)
   IPC_STRUCT_TRAITS_MEMBER(proxy_server)
+  IPC_STRUCT_TRAITS_MEMBER(is_using_lofi)
 IPC_STRUCT_TRAITS_END()
 
 IPC_STRUCT_TRAITS_BEGIN(net::RedirectInfo)
@@ -270,6 +272,10 @@ IPC_STRUCT_BEGIN(ResourceHostMsg_Request)
 
   // Whether to intercept headers to pass back to the renderer.
   IPC_STRUCT_MEMBER(bool, report_raw_headers)
+
+  // Whether or not to request a LoFi version of the resource or let the browser
+  // decide.
+  IPC_STRUCT_MEMBER(content::LoFiState, lofi_state)
 IPC_STRUCT_END()
 
 // Parameters for a ResourceMsg_RequestComplete