<webview>: Fix navigation/attachment race

content/renderer/browser_plugin/browser_plugin.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  CONTENT_RENDERER_BROWSER_PLUGIN_BROWSER_PLUGIN_H_
 #define  CONTENT_RENDERER_BROWSER_PLUGIN_BROWSER_PLUGIN_H_
 
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebPlugin.h"
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 81 matching lines @@
 
   // Get the guest's DOMWindow proxy.
   NPObject* GetContentWindow() const;
 
   // Returns Chrome's process ID for the current guest.
   int guest_process_id() const { return guest_process_id_; }
   // Returns Chrome's route ID for the current guest.
   int guest_route_id() const { return guest_route_id_; }
   // Returns whether the guest process has crashed.
   bool guest_crashed() const { return guest_crashed_; }
-  bool HasGuest() const;
+  // Returns whether this BrowserPlugin has requested an instance ID.
+  bool HasNavigated() const;
+  // Returns whether this BrowserPlugin has allocated an instance ID.
+  bool HasInstanceID() const;
 
   // Attaches the window identified by |window_id| to the the given node
   // encapsulating a BrowserPlugin.
   static bool AttachWindowTo(const WebKit::WebNode& node,
                              int window_id);
 
   // Query whether the guest can navigate back to the previous entry.
   bool CanGoBack() const;
   // Query whether the guest can navigation forward to the next entry.
   bool CanGoForward() const;
@@ skipping 335 matching lines @@
   // Weak factory used in v8 |MakeWeak| callback, since the v8 callback might
   // get called after BrowserPlugin has been destroyed.
   base::WeakPtrFactory<BrowserPlugin> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserPlugin);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_BROWSER_PLUGIN_BROWSER_PLUGIN_H_