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

chrome/browser/ui/browser_instant_controller.cc

Index: chrome/browser/ui/browser_instant_controller.cc
diff --git a/chrome/browser/ui/browser_instant_controller.cc b/chrome/browser/ui/browser_instant_controller.cc
index 15ec0efa678a1b45dad23dd1d29a556d43671567..86d234ea97b112136db8f5c2d3eafae7ac13ba3c 100644
--- a/chrome/browser/ui/browser_instant_controller.cc
+++ b/chrome/browser/ui/browser_instant_controller.cc
@@ -161,6 +161,15 @@ void BrowserInstantController::UpdateThemeInfoForPreview() {
     OnThemeChanged(NULL);
 }
 
+void BrowserInstantController::OpenURLInCurrentTab(const GURL& url) {
+  browser_->OpenURL(content::OpenURLParams(
+      url,
+      content::Referrer(),
+      CURRENT_TAB,
+      content::PAGE_TRANSITION_TYPED,
+      false));
+}
+
 void BrowserInstantController::ResetInstant() {
   instant_.SetInstantEnabled(IsInstantEnabled(browser_->profile()));
 }