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

chrome/browser/instant/instant_controller.cc

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/instant/instant_controller.h"
 
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
@@ skipping 774 matching lines @@
 
 void InstantController::InstantLoaderRenderViewGone() {
   ++blacklisted_urls_[loader_->instant_url()];
   HideInternal();
   delete loader_->ReleaseContents();
   // Delay deletion as we have gotten here from an InstantLoader method.
   MessageLoop::current()->DeleteSoon(FROM_HERE, loader_.release());
   CreateDefaultLoader();
 }
 
+void InstantController::NavigateToURL(const GURL& url) {
+  CommitIfPossible(INSTANT_COMMIT_REQUESTED_NAVIGATION);

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

Do we want to commit here?  If a URL suggestion was selected on the instant
overlay, we'd only be showing the "Press [enter] to navigate" message which
doesn't seem to be particularly useful to have in your navigation stack.

The other alternative is to just navigate the current tab, and in the cases
where we were using a loader, just hide it.  What do you think?

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

Like we discussed, we will keep the committing logic separate which should be
addressed by the user possibly clicking on the page.

+  browser_->OpenURLInCurrentTab(url);
+}
+
 bool InstantController::ResetLoader(const TemplateURL* template_url,
                                     const content::WebContents* active_tab) {
   std::string instant_url;
   if (!GetInstantURL(template_url, &instant_url))
     return false;
 
   if (loader_ && loader_->instant_url() == instant_url)
     return true;
 
   HideInternal();
@@ skipping 225 matching lines @@
   }
 
   std::map<std::string, int>::const_iterator iter =
       blacklisted_urls_.find(*instant_url);
   if (iter != blacklisted_urls_.end() &&
       iter->second > kMaxInstantSupportFailures)
     return false;
 
   return true;
 }