Add new IPC for searchbox to pipe SearchBox NavigateContentWindow calls to the browser.

chrome/browser/instant/instant_controller.cc

Index: chrome/browser/instant/instant_controller.cc
diff --git a/chrome/browser/instant/instant_controller.cc b/chrome/browser/instant/instant_controller.cc
index 1e63886b896da48c173bbbb985d178fc240b5439..6e0224b61756459d847a235f1d5d8d2cf3b4e68b 100644
--- a/chrome/browser/instant/instant_controller.cc
+++ b/chrome/browser/instant/instant_controller.cc
@@ -766,6 +766,11 @@ void InstantController::InstantLoaderContentsFocused() {
 #endif
 }
 
+void InstantController::NavigateToURL(const GURL& url) {
+  CommitIfCurrent(INSTANT_COMMIT_CLICKED_RESULT);
+  browser_->OpenURLInCurrentTab(url);
+}
+
 bool InstantController::ResetLoader(const TemplateURL* template_url,
                                     const content::WebContents* active_tab) {
   std::string instant_url;