On Windows, create a new TransportDIB::Handle struct which includes the file

chrome/common/render_messages_params.h

Index: chrome/common/render_messages_params.h
diff --git a/chrome/common/render_messages_params.h b/chrome/common/render_messages_params.h
index 2eeff7075862e0aab4c24df2351b736ca06d5dea..211de1aee0d9c6ebf7872e4054df6e43198e8137 100644
--- a/chrome/common/render_messages_params.h
+++ b/chrome/common/render_messages_params.h
@@ -321,9 +321,12 @@ struct ViewHostMsg_UpdateRect_Params {
   ViewHostMsg_UpdateRect_Params();
   ~ViewHostMsg_UpdateRect_Params();
 
-  // The bitmap to be painted into the view at the locations specified by
-  // update_rects.
-  TransportDIB::Id bitmap;
+  // The ID of the bitmap to be painted into the view at the locations specified
+  // by update_rects.
+  TransportDIB::Id dib_id;
+
+  // The handle to the bitmap, in case it needs to be mapped on the browser.
+  TransportDIB::Handle dib_handle;
 
   // The position and size of the bitmap.
   gfx::Rect bitmap_rect;