<webview>: Partially migrate loadcommit event from content to chrome

chrome/browser/adview/adview_guest.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_ADVIEW_ADVIEW_GUEST_H_
+#define CHROME_BROWSER_ADVIEW_ADVIEW_GUEST_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "base/observer_list.h"
+#include "base/values.h"
+#include "content/public/browser/web_contents_observer.h"
+
+// An AdViewGuest is a WebContentsObserver on the guest WebContents of a
+// <adview> tag. It provides the browser-side implementation of the <adview>
+// API and manages the lifetime of <adview> extension events. AdViewGuest is
+// created on attachment. When a guest WebContents is associated with
+// a particular embedder WebContents, we call this "attachment".
+// TODO(fsamuel): There might be an opportunity here to refactor and reuse code
+// between AdViewGuest and WebViewGuest.
+class AdViewGuest : public content::WebContentsObserver {
+ public:
+  AdViewGuest(content::WebContents* guest_web_contents,
+              content::WebContents* embedder_web_contents,
+              const std::string& extension_id,
+              int adview_instance_id,
+              const base::DictionaryValue& args);
+
+  static AdViewGuest* From(int embedder_process_id, int instance_id);
+
+  content::WebContents* embedder_web_contents() const {
+    return embedder_web_contents_;
+  }
+
+  content::WebContents* web_contents() const {
+    return WebContentsObserver::web_contents();
+  }
+
+  int view_instance_id() const { return view_instance_id_; }
+
+ private:
+  virtual ~AdViewGuest();
+
+  void DispatchEvent(const std::string& event_name,
+                     scoped_ptr<DictionaryValue> event);
+
+  virtual void DidCommitProvisionalLoadForFrame(
+      int64 frame_id,
+      bool is_main_frame,
+      const GURL& url,
+      content::PageTransition transition_type,
+      content::RenderViewHost* render_view_host) OVERRIDE;
+  virtual void WebContentsDestroyed(
+      content::WebContents* web_contents) OVERRIDE;
+
+  content::WebContents* embedder_web_contents_;
+  const std::string extension_id_;
+  const int embedder_render_process_id_;
+  // Profile and instance ID are cached here because |web_contents()| is
+  // null on destruction.
+  void* profile_;
+  // |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 RenderView for a particular <adview> instance.
+  const int view_instance_id_;
+
+  DISALLOW_COPY_AND_ASSIGN(AdViewGuest);
+};
+
+#endif  // CHROME_BROWSER_ADVIEW_ADVIEW_GUEST_H_