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

chrome/browser/instant/instant_client.cc

Index: chrome/browser/instant/instant_client.cc
diff --git a/chrome/browser/instant/instant_client.cc b/chrome/browser/instant/instant_client.cc
index 6f23d9a8540191e64a238431b00fd681ec830527..1582a97347321cdaf7f14ab84d93e2d8cf69cdc9 100644
--- a/chrome/browser/instant/instant_client.cc
+++ b/chrome/browser/instant/instant_client.cc
@@ -97,6 +97,8 @@ bool InstantClient::OnMessageReceived(const IPC::Message& message) {
                         StartCapturingKeyStrokes);
     IPC_MESSAGE_HANDLER(ChromeViewHostMsg_StopCapturingKeyStrokes,
                         StopCapturingKeyStrokes);
+    IPC_MESSAGE_HANDLER(ChromeViewHostMsg_SearchBoxNavigate,
+                        SearchBoxNavigate);
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
@@ -146,3 +148,10 @@ void InstantClient::StopCapturingKeyStrokes(int page_id) {
   if (web_contents()->IsActiveEntry(page_id))
     delegate_->StopCapturingKeyStrokes();
 }
+
+void InstantClient::SearchBoxNavigate(int page_id,
+                                      const GURL& url,
+                                      content::PageTransition transition) {
+  if (web_contents()->IsActiveEntry(page_id))
+    delegate_->NavigateToURL(url, transition);
+}