Begin abstracting sending of IPC from autofill core code.

components/autofill/content/browser/autofill_driver_impl.cc

Index: components/autofill/content/browser/autofill_driver_impl.cc
diff --git a/components/autofill/content/browser/autofill_driver_impl.cc b/components/autofill/content/browser/autofill_driver_impl.cc
index 095822cb32c9a9e884a0f55bd845026818be2dfa..7cb43f6a517f30ea40f527f63253eef2d9c0fe8c 100644
--- a/components/autofill/content/browser/autofill_driver_impl.cc
+++ b/components/autofill/content/browser/autofill_driver_impl.cc
@@ -9,6 +9,7 @@
 #include "components/autofill/core/browser/autofill_manager_delegate.h"
 #include "components/autofill/core/common/autofill_messages.h"
 #include "content/public/browser/navigation_details.h"
+#include "content/public/browser/render_view_host.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/common/frame_navigate_params.h"
 #include "ipc/ipc_message_macros.h"
@@ -68,6 +69,17 @@ content::WebContents* AutofillDriverImpl::GetWebContents() {
   return web_contents();
 }
 
+bool AutofillDriverImpl::CanSendToRenderer() {
+  return (web_contents()->GetRenderViewHost() != NULL);
+}
+
+void AutofillDriverImpl::SendFormDataToRenderer(int query_id, FormData data) {
+  DCHECK(CanSendToRenderer());
+  content::RenderViewHost* host = web_contents()->GetRenderViewHost();
+  host->Send(
+      new AutofillMsg_FormDataFilled(host->GetRoutingID(), query_id, data));
+}
+
 bool AutofillDriverImpl::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(AutofillDriverImpl, message)