Send ChromeViewMsg_SearchBoxSetSuggestionToPrefetch IPC message from SearchIPCRouter.

chrome/browser/ui/search/instant_controller.cc

Index: chrome/browser/ui/search/instant_controller.cc
diff --git a/chrome/browser/ui/search/instant_controller.cc b/chrome/browser/ui/search/instant_controller.cc
index 9b6c1d2c38d0fe7062d4767ed47ffa580f008535..d268a52a394be188be7426c4a61485b68204e8ec 100644
--- a/chrome/browser/ui/search/instant_controller.cc
+++ b/chrome/browser/ui/search/instant_controller.cc
@@ -125,8 +125,10 @@ void InstantController::SetOmniboxBounds(const gfx::Rect& bounds) {
 
 void InstantController::SetSuggestionToPrefetch(
     const InstantSuggestion& suggestion) {
-  if (instant_tab_ && search_mode_.is_search())
-    instant_tab_->sender()->SetSuggestionToPrefetch(suggestion);
+  if (instant_tab_ && search_mode_.is_search()) {
+    SearchTabHelper::FromWebContents(instant_tab_->contents())->
+        SetSuggestionToPrefetch(suggestion);
+  }
 }
 
 void InstantController::ToggleVoiceSearch() {