Instant: small cleanups

chrome/browser/ui/search/instant_tab.h

 // Copyright 2013 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.
 
 #ifndef CHROME_BROWSER_UI_SEARCH_INSTANT_TAB_H_
 #define CHROME_BROWSER_UI_SEARCH_INSTANT_TAB_H_
 
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "content/public/browser/web_contents_observer.h"
 
 class GURL;
 
 namespace content {
 class WebContents;
 }
 
-// InstantTab is used to exchange messages with a page that implements the
-// Instant/Embedded Search API (http://dev.chromium.org/embeddedsearch).
+// InstantTab is instantiated by InstantController for the current tab if it
+// is a New Tab page.
 class InstantTab : public content::WebContentsObserver {
  public:
   // InstantTab calls its delegate in response to messages received from the
   // page. Each method is called with the |contents| corresponding to the page
   // we are observing.
   class Delegate {
    public:
     // Called when the page is about to navigate to |url|.
     virtual void InstantTabAboutToNavigateMainFrame(
         const content::WebContents* contents,
@@ skipping 16 matching lines @@
       content::NavigationHandle* navigation_handle) override;
 
   Delegate* const delegate_;
 
   content::WebContents* pending_web_contents_;
 
   DISALLOW_COPY_AND_ASSIGN(InstantTab);
 };
 
 #endif  // CHROME_BROWSER_UI_SEARCH_INSTANT_TAB_H_