Convert instant search messages to Mojo

chrome/browser/ui/search/search_tab_helper.h

Index: chrome/browser/ui/search/search_tab_helper.h
diff --git a/chrome/browser/ui/search/search_tab_helper.h b/chrome/browser/ui/search/search_tab_helper.h
index 35c9ee7c142e65d27294bd75b8c89d9e9ba1853a..96c5add0f2f817f0f7d862d468781b1cb9beb237 100644
--- a/chrome/browser/ui/search/search_tab_helper.h
+++ b/chrome/browser/ui/search/search_tab_helper.h
@@ -83,6 +83,8 @@ class SearchTabHelper : public content::WebContentsObserver,
 
   void set_delegate(SearchTabHelperDelegate* delegate) { delegate_ = delegate; }
 
+  SearchIPCRouter& ipc_router_for_testing() { return ipc_router_; }
+
  private:
   friend class content::WebContentsUserData<SearchTabHelper>;
   friend class SearchIPCRouterPolicyTest;
@@ -167,9 +169,6 @@ class SearchTabHelper : public content::WebContentsObserver,
   // received.
   void DetermineIfPageSupportsInstant();
 
-  // Used by unit tests.
-  SearchIPCRouter& ipc_router() { return ipc_router_; }
-
   Profile* profile() const;
 
   // Returns whether input is in progress, i.e. if the omnibox has focus and the