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

chrome/browser/instant/instant_tab.cc

Index: chrome/browser/instant/instant_tab.cc
diff --git a/chrome/browser/instant/instant_tab.cc b/chrome/browser/instant/instant_tab.cc
index 302dba923d868508f2bd59f430376453ee571a2b..edc877e04a754cd0624e77594ebf25b3d1bbde98 100644
--- a/chrome/browser/instant/instant_tab.cc
+++ b/chrome/browser/instant/instant_tab.cc
@@ -83,3 +83,7 @@ void InstantTab::StopCapturingKeyStrokes() {
 void InstantTab::RenderViewGone() {
   // For a commit page, a crash should not be handled differently.
 }
+
+void InstantTab::NavigateToURL(const GURL& url) {
+  // We don't honor this call from committed tabs.

[samarth, 2012/12/11 04:42:10]

Sorry, I missed this before but we do need this for committed tabs too, no?  For
example, you search for [abc], hit enter.  Then if you type [chrome://settings]
in the omnibox, we'll reuse the committed search page to render the suggestions
and you still need to be able to click on the chrome:// nav suggestion.

[Shishir, 2012/12/11 20:22:39]

Thanks for pointing this out. Fixed.

+}