Merge InstantPage into InstantTab.

chrome/browser/ui/search/instant_page.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_PAGE_H_
-#define CHROME_BROWSER_UI_SEARCH_INSTANT_PAGE_H_
-
-#include "base/compiler_specific.h"
-#include "base/gtest_prod_util.h"
-#include "base/macros.h"
-#include "chrome/browser/ui/search/search_model_observer.h"
-#include "content/public/browser/web_contents_observer.h"
-#include "ui/base/page_transition_types.h"
-
-class GURL;
-
-namespace content {
-class RenderFrameHost;
-class WebContents;
-}
-
-// InstantPage is used to exchange messages with a page that implements the
-// Instant/Embedded Search API (http://dev.chromium.org/embeddedsearch).
-// InstantPage is not used directly but via its derived class, InstantTab.
-class InstantPage : public content::WebContentsObserver,
-                    public SearchModelObserver {
- public:
-  // InstantPage 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 upon determination of Instant API support. Either in response to
-    // the page loading or because we received some other message.
-    virtual void InstantSupportDetermined(const content::WebContents* contents,
-                                          bool supports_instant) = 0;
-
-    // Called when the page is about to navigate to |url|.
-    virtual void InstantPageAboutToNavigateMainFrame(
-        const content::WebContents* contents,
-        const GURL& url) = 0;
-
-   protected:
-    virtual ~Delegate();
-  };
-
-  ~InstantPage() override;
-
-  // Returns true if the page is known to support the Instant API. This starts
-  // out false, and is set to true whenever we get any message from the page.
-  // Once true, it never becomes false (the page isn't expected to drop API
-  // support suddenly).
-  bool supports_instant() const;
-
-  // Returns true if the page is the local NTP (i.e. its URL is
-  // chrome::kChromeSearchLocalNTPURL).
-  bool IsLocal() const;
-
- protected:
-  explicit InstantPage(Delegate* delegate);
-
-  // Sets |web_contents| as the page to communicate with. |web_contents| may be
-  // NULL, which effectively stops all communication.
-  void SetContents(content::WebContents* web_contents);
-
-  Delegate* delegate() const { return delegate_; }
-
-  // This method is called before processing messages received from the page.
-  virtual bool ShouldProcessAboutToNavigateMainFrame();
-
- private:
-  FRIEND_TEST_ALL_PREFIXES(InstantPageTest, IsLocal);
-  FRIEND_TEST_ALL_PREFIXES(InstantPageTest,
-                           DetermineIfPageSupportsInstant_Local);
-  FRIEND_TEST_ALL_PREFIXES(InstantPageTest,
-                           DetermineIfPageSupportsInstant_NonLocal);
-  FRIEND_TEST_ALL_PREFIXES(InstantPageTest,
-                           PageURLDoesntBelongToInstantRenderer);
-  FRIEND_TEST_ALL_PREFIXES(InstantPageTest, PageSupportsInstant);
-
-  // Overridden from content::WebContentsObserver:
-  void DidCommitProvisionalLoadForFrame(
-      content::RenderFrameHost* render_frame_host,
-      const GURL& url,
-      ui::PageTransition transition_type) override;
-
-  // Overridden from SearchModelObserver:
-  void ModelChanged(const SearchModel::State& old_state,
-                    const SearchModel::State& new_state) override;
-
-  // Update the status of Instant support.
-  void InstantSupportDetermined(bool supports_instant);
-
-  void ClearContents();
-
-  Delegate* const delegate_;
-
-  DISALLOW_COPY_AND_ASSIGN(InstantPage);
-};
-
-#endif  // CHROME_BROWSER_UI_SEARCH_INSTANT_PAGE_H_