[Sheriff] Revert "Revert "Revert 266297 "1. Handle the case of empty embedder_extension_id..."""

chrome/browser/guest_view/guest_view_base.h

-// Copyright 2014 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_GUEST_VIEW_GUEST_VIEW_BASE_H_
-#define CHROME_BROWSER_GUEST_VIEW_GUEST_VIEW_BASE_H_
-
-#include <queue>
-
-#include "base/memory/weak_ptr.h"
-#include "base/values.h"
-#include "content/public/browser/browser_plugin_guest_delegate.h"
-#include "content/public/browser/web_contents.h"
-
-class AdViewGuest;
-class WebViewGuest;
-struct RendererContentSettingRules;
-
-// A GuestViewBase is the base class browser-side API implementation for a
-// <*view> tag. GuestViewBase maintains an association between a guest
-// WebContents and an embedder WebContents. It receives events issued from
-// the guest and relays them to the embedder.
-class GuestViewBase : public content::BrowserPluginGuestDelegate {
- public:
-  class Event {
-   public:
-    Event(const std::string& name, scoped_ptr<base::DictionaryValue> args);
-    ~Event();
-
-    const std::string& name() const { return name_; }
-
-    scoped_ptr<base::DictionaryValue> GetArguments();
-
-   private:
-    const std::string name_;
-    scoped_ptr<base::DictionaryValue> args_;
-  };
-
-  // Returns a *ViewGuest if this GuestView is of the given view type.
-  template <typename T>
-  T* As() {
-    if (GetViewType() == T::Type) {
-      return static_cast<T*>(this);
-    }
-    return NULL;
-  }
-
-  static GuestViewBase* Create(content::WebContents* guest_web_contents,
-                               const std::string& embedder_extension_id,
-                               const std::string& view_type);
-
-  static GuestViewBase* FromWebContents(content::WebContents* web_contents);
-
-  static GuestViewBase* From(int embedder_process_id, int instance_id);
-
-  // For GuestViewBases, we create special guest processes, which host the
-  // tag content separately from the main application that embeds the tag.
-  // A GuestViewBase can specify both the partition name and whether the storage
-  // for that partition should be persisted. Each tag gets a SiteInstance with
-  // a specially formatted URL, based on the application it is hosted by and
-  // the partition requested by it. The format for that URL is:
-  // chrome-guest://partition_domain/persist?partition_name
-  static bool GetGuestPartitionConfigForSite(const GURL& site,
-                                             std::string* partition_domain,
-                                             std::string* partition_name,
-                                             bool* in_memory);
-
-  // By default, JavaScript and images are enabled in guest content.
-  static void GetDefaultContentSettingRules(RendererContentSettingRules* rules,
-                                            bool incognito);
-
-  virtual const std::string& GetViewType() const = 0;
-
-  virtual void Attach(content::WebContents* embedder_web_contents,
-                      const base::DictionaryValue& args);
-
-  content::WebContents* embedder_web_contents() const {
-    return embedder_web_contents_;
-  }
-
-  // Returns the guest WebContents.
-  content::WebContents* guest_web_contents() const {
-    return guest_web_contents_;
-  }
-
-  // Returns whether this guest has an associated embedder.
-  bool attached() const { return !!embedder_web_contents_; }
-
-  // Returns the instance ID of the <*view> element.
-  int view_instance_id() const { return view_instance_id_; }
-
-  // Returns the instance ID of the guest WebContents.
-  int guest_instance_id() const { return guest_instance_id_; }
-
-  // Returns the extension ID of the embedder.
-  const std::string& embedder_extension_id() const {
-    return embedder_extension_id_;
-  }
-
-  // Returns whether this GuestView is embedded in an extension/app.
-  bool in_extension() const { return !embedder_extension_id_.empty(); }
-
-  // Returns the user browser context of the embedder.
-  content::BrowserContext* browser_context() const { return browser_context_; }
-
-  // Returns the embedder's process ID.
-  int embedder_render_process_id() const { return embedder_render_process_id_; }
-
- protected:
-  GuestViewBase(content::WebContents* guest_web_contents,
-                const std::string& embedder_extension_id);
-  virtual ~GuestViewBase();
-
-  // Dispatches an event |event_name| to the embedder with the |event| fields.
-  void DispatchEvent(Event* event);
-
- private:
-  void SendQueuedEvents();
-
-  content::WebContents* const guest_web_contents_;
-  content::WebContents* embedder_web_contents_;
-  const std::string embedder_extension_id_;
-  int embedder_render_process_id_;
-  content::BrowserContext* const browser_context_;
-  // |guest_instance_id_| is a profile-wide unique identifier for a guest
-  // WebContents.
-  const int guest_instance_id_;
-  // |view_instance_id_| is an identifier that's unique within a particular
-  // embedder RenderViewHost for a particular <*view> instance.
-  int view_instance_id_;
-
-  // This is a queue of Events that are destined to be sent to the embedder once
-  // the guest is attached to a particular embedder.
-  std::deque<linked_ptr<Event> > pending_events_;
-
-  // This is used to ensure pending tasks will not fire after this object is
-  // destroyed.
-  base::WeakPtrFactory<GuestViewBase> weak_ptr_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(GuestViewBase);
-};
-
-#endif  // CHROME_BROWSER_GUEST_VIEW_GUEST_VIEW_BASE_H_