Revert 157773 - This is followup from Charlie's comments on Fady's cl: http://chromiumcodereview.ap…

content/browser/browser_plugin/browser_plugin_embedder.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.
-
-// A BrowserPluginEmbedder has a list of guests it manages.
-// In the beginning when a renderer sees one or more guests (BrowserPlugin
-// instance(s)) and there is a request to navigate to them, the WebContents for
-// that renderer creates a BrowserPluginEmbedder for itself. The
-// BrowserPluginEmbedder, in turn, manages a set of BrowserPluginGuests -- one
-// BrowserPluginGuest for each guest in the embedding WebContents. Note that
-// each of these BrowserPluginGuest objects has its own WebContents.
-// BrowserPluginEmbedder routes any messages directed to a guest from the
-// renderer (BrowserPlugin) to the appropriate guest (identified by the guest's
-// |instance_id|).
-//
-// BrowserPluginEmbedder is responsible for cleaning up the guests when the
-// embedder frame navigates away to a different page or deletes the guests from
-// the existing page.
-
-#ifndef CONTENT_BROWSER_BROWSER_PLUGIN_BROWSER_PLUGIN_EMBEDDER_H_
-#define CONTENT_BROWSER_BROWSER_PLUGIN_BROWSER_PLUGIN_EMBEDDER_H_
-
-#include <map>
-
-#include "base/compiler_specific.h"
-#include "content/public/browser/notification_observer.h"
-#include "content/public/browser/notification_registrar.h"
-#include "content/public/browser/web_contents_observer.h"
-
-class TransportDIB;
-class WebContentsImpl;
-
-namespace WebKit {
-class WebInputEvent;
-}
-
-namespace gfx {
-class Rect;
-class Size;
-}
-
-namespace content {
-
-class BrowserPluginGuest;
-class BrowserPluginHostFactory;
-
-// A browser plugin embedder provides functionality for WebContents to operate
-// in the 'embedder' role. It manages list of guests inside the embedder.
-//
-// The embedder's WebContents manages the lifetime of the embedder. They are
-// created when a renderer asks WebContents to navigate (for the first time) to
-// some guest. It gets destroyed when either the WebContents goes away or there
-// is a RenderViewHost swap in WebContents.
-class CONTENT_EXPORT BrowserPluginEmbedder : public WebContentsObserver,
-                                             public NotificationObserver {
- public:
-  typedef std::map<int, WebContents*> ContainerInstanceMap;
-
-  virtual ~BrowserPluginEmbedder();
-
-  static BrowserPluginEmbedder* Create(WebContentsImpl* web_contents,
-                                       RenderViewHost* render_view_host);
-
-  // Navigates in a guest (new or existing).
-  void NavigateGuest(RenderViewHost* render_view_host,
-                     int instance_id,
-                     int64 frame_id,
-                     const std::string& src,
-                     const gfx::Size& size);
-
-  // WebContentsObserver implementation.
-  virtual void RenderViewDeleted(RenderViewHost* render_view_host) OVERRIDE;
-  virtual void RenderViewGone(base::TerminationStatus status) OVERRIDE;
-
-  // NotificationObserver method override.
-  virtual void Observe(int type,
-                       const NotificationSource& source,
-                       const NotificationDetails& details) OVERRIDE;
-
-  // Overrides factory for testing. Default (NULL) value indicates regular
-  // (non-test) environment.
-  static void set_factory_for_testing(BrowserPluginHostFactory* factory) {
-    factory_ = factory;
-  }
-
- private:
-  friend class BrowserPluginEmbedderHelper;
-  friend class TestBrowserPluginEmbedder;
-
-  BrowserPluginEmbedder(WebContentsImpl* web_contents,
-                        RenderViewHost* render_view_host);
-
-  // Returns a guest browser plugin delegate by its container ID specified
-  // in BrowserPlugin.
-  BrowserPluginGuest* GetGuestByInstanceID(int instance_id) const;
-  // Adds a new guest web_contents to the embedder (overridable in test).
-  virtual void AddGuest(int instance_id,
-                        WebContents* guest_web_contents,
-                        int64 frame_id);
-  void DestroyGuestByInstanceID(int instance_id);
-  void DestroyGuests();
-
-  // Message handlers (direct/indirect via BrowserPluginEmbedderHelper).
-  // Routes update rect ack message to the appropriate guest.
-  void UpdateRectACK(int instance_id, int message_id, const gfx::Size& size);
-  void SetFocus(int instance_id, bool focused);
-  void ResizeGuest(int instance_id,
-                   TransportDIB* damage_buffer,
-#if defined(OS_WIN)
-                   int damage_buffer_size,
-#endif
-                   int width,
-                   int height,
-                   bool resize_pending,
-                   float scale_factor);
-  // Handles input events sent from the BrowserPlugin (embedder's renderer
-  // process) by passing them to appropriate guest's input handler.
-  void HandleInputEvent(int instance_id,
-                        RenderViewHost* render_view_host,
-                        const gfx::Rect& guest_rect,
-                        const WebKit::WebInputEvent& event,
-                        IPC::Message* reply_message);
-  void PluginDestroyed(int instance_id);
-
-  // Called when visiblity of web_contents changes, so the embedder will
-  // show/hide its guest.
-  void WebContentsVisibilityChanged(bool visible);
-
-  // Static factory instance (always NULL for non-test).
-  static BrowserPluginHostFactory* factory_;
-
-  // A scoped container for notification registries.
-  NotificationRegistrar registrar_;
-
-  // Contains guests' WebContents, mapping from their instance ids.
-  ContainerInstanceMap guest_web_contents_by_instance_id_;
-  RenderViewHost* render_view_host_;
-
-  DISALLOW_COPY_AND_ASSIGN(BrowserPluginEmbedder);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_BROWSER_PLUGIN_BROWSER_PLUGIN_EMBEDDER_H_