Remove implementation of Panels on OSes other than ChromeOS.

chrome/browser/ui/panels/panel_host.h

-// Copyright (c) 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.
-
-#ifndef CHROME_BROWSER_UI_PANELS_PANEL_HOST_H_
-#define CHROME_BROWSER_UI_PANELS_PANEL_HOST_H_
-
-#include <memory>
-
-#include "base/macros.h"
-#include "base/memory/weak_ptr.h"
-#include "content/public/browser/web_contents_delegate.h"
-#include "content/public/browser/web_contents_observer.h"
-#include "content/public/common/page_zoom.h"
-#include "extensions/browser/extension_function_dispatcher.h"
-
-class GURL;
-class Panel;
-class PrefsTabHelper;
-class Profile;
-
-namespace content {
-class SiteInstance;
-class WebContents;
-}
-
-namespace extensions {
-class WindowController;
-}
-
-namespace gfx {
-class Image;
-class Rect;
-}
-
-// Helper class for Panel, implementing WebContents hosting and Extension
-// delegates. Owned and used by Panel only.
-class PanelHost : public content::WebContentsDelegate,
-                  public content::WebContentsObserver,
-                  public extensions::ExtensionFunctionDispatcher::Delegate {
- public:
-  PanelHost(Panel* panel, Profile* profile);
-  ~PanelHost() override;
-
-  void Init(const GURL& url, content::SiteInstance* source_site_instance);
-  content::WebContents* web_contents() { return web_contents_.get(); }
-  void DestroyWebContents();
-
-  // Returns the icon for the current page.
-  gfx::Image GetPageIcon() const;
-
-  // content::WebContentsDelegate overrides.
-  content::WebContents* OpenURLFromTab(
-      content::WebContents* source,
-      const content::OpenURLParams& params) override;
-  void NavigationStateChanged(content::WebContents* source,
-                              content::InvalidateTypes changed_flags) override;
-  void AddNewContents(content::WebContents* source,
-                      content::WebContents* new_contents,
-                      WindowOpenDisposition disposition,
-                      const gfx::Rect& initial_rect,
-                      bool user_gesture,
-                      bool* was_blocked) override;
-  void ActivateContents(content::WebContents* contents) override;
-  void LoadingStateChanged(content::WebContents* source,
-                           bool to_different_document) override;
-  void CloseContents(content::WebContents* source) override;
-  void MoveContents(content::WebContents* source,
-                    const gfx::Rect& pos) override;
-  bool IsPopupOrPanel(const content::WebContents* source) const override;
-  void ContentsZoomChange(bool zoom_in) override;
-  void HandleKeyboardEvent(
-      content::WebContents* source,
-      const content::NativeWebKeyboardEvent& event) override;
-  void ResizeDueToAutoResize(content::WebContents* web_contents,
-                             const gfx::Size& new_size) override;
-
-  // content::WebContentsObserver overrides.
-  void RenderProcessGone(base::TerminationStatus status) override;
-  void WebContentsDestroyed() override;
-
-  // extensions::ExtensionFunctionDispatcher::Delegate overrides.
-  extensions::WindowController* GetExtensionWindowController() const override;
-  content::WebContents* GetAssociatedWebContents() const override;
-
-  // Actions on web contents.
-  void Reload();
-  void ReloadBypassingCache();
-  void StopLoading();
-  void Zoom(content::PageZoom zoom);
-
- private:
-  // Helper to close panel via the message loop.
-  void ClosePanel();
-
-  Panel* panel_;  // Weak, owns us.
-  Profile* profile_;
-
-  std::unique_ptr<content::WebContents> web_contents_;
-
-  // The following factory is used to close the panel via the message loop.
-  base::WeakPtrFactory<PanelHost> weak_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(PanelHost);
-};
-
-#endif  // CHROME_BROWSER_UI_PANELS_PANEL_HOST_H_