Move allocate instance id to chrome/.

chrome/browser/guest_view/web_view/web_view_guest.h

Index: chrome/browser/guest_view/web_view/web_view_guest.h
diff --git a/chrome/browser/guest_view/web_view/web_view_guest.h b/chrome/browser/guest_view/web_view/web_view_guest.h
index c88de6ccc7362c4f61f68a147c6fa914f3fb219d..5f8f01cf1704d3510a4f35c16bcbf28c54548f3f 100644
--- a/chrome/browser/guest_view/web_view/web_view_guest.h
+++ b/chrome/browser/guest_view/web_view/web_view_guest.h
@@ -56,6 +56,9 @@ class WebViewGuest : public GuestView<WebViewGuest>,
   static int GetViewInstanceId(content::WebContents* contents);
   static const char Type[];
 
+  // Request navigating the guest to the provided |src| URL.
+  void NavigateGuest(const std::string& src);
+
   typedef std::vector<linked_ptr<webview_api::ContextMenuItem> > MenuItemVector;
   // Shows the context menu for the guest.
   // |items| acts as a filter. This restricts the current context's default
@@ -127,7 +130,7 @@ class WebViewGuest : public GuestView<WebViewGuest>,
                                   content::WebContents* new_contents) OVERRIDE;
 
   // GuestDelegate implementation.
-  virtual void DidAttach() OVERRIDE;
+  virtual void DidAttach(const base::DictionaryValue& extra_params) OVERRIDE;
   virtual void EmbedderDestroyed() OVERRIDE;
   virtual bool IsDragAndDropEnabled() OVERRIDE;
   virtual void SizeChanged(const gfx::Size& old_size, const gfx::Size& new_size)
@@ -136,7 +139,6 @@ class WebViewGuest : public GuestView<WebViewGuest>,
       bool user_gesture,
       bool last_unlocked_by_target,
       const base::Callback<void(bool)>& callback) OVERRIDE;
-  virtual void NavigateGuest(const std::string& src) OVERRIDE;
   virtual void Destroy() OVERRIDE;
 
   // NotificationObserver implementation.