Add API to construct new vector interchange MIME data type.

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index da8a9ac5853e2b4813459381c377f808ba95081c..089884ef2874f1379661914be7da6e28309ee4f1 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -3792,6 +3792,9 @@ void RenderViewImpl::didCreateScriptContext(WebFrame* frame,
                                             int world_id) {
   content::GetContentClient()->renderer()->DidCreateScriptContext(
       frame, context, extension_group, world_id);
+
+  intents_host_->DidCreateScriptContext(
+      frame, context, extension_group, world_id);
 }
 
 void RenderViewImpl::didCreateScriptContext(WebFrame* frame,
@@ -3799,6 +3802,8 @@ void RenderViewImpl::didCreateScriptContext(WebFrame* frame,
                                             int world_id) {
   content::GetContentClient()->renderer()->DidCreateScriptContext(
       frame, context, -1, world_id);
+
+  intents_host_->DidCreateScriptContext(frame, context, -1, world_id);
 }
 
 void RenderViewImpl::willReleaseScriptContext(WebFrame* frame,