Remove BrowserPlugin's -internal-attach method

extensions/browser/guest_view/guest_view_manager.h

Index: extensions/browser/guest_view/guest_view_manager.h
diff --git a/extensions/browser/guest_view/guest_view_manager.h b/extensions/browser/guest_view/guest_view_manager.h
index 44f4249a9babddf371474e1cbdf76236ad21d7bf..cf4b83f49f27052cf217111588f97772a773bbf3 100644
--- a/extensions/browser/guest_view/guest_view_manager.h
+++ b/extensions/browser/guest_view/guest_view_manager.h
@@ -47,6 +47,15 @@ class GuestViewManager : public content::BrowserPluginGuestManager,
       int guest_instance_id,
       int embedder_render_process_id);
 
+  // Associates the Browser Plugin with |element_instance_id| to a
+  // guest that has ID of |guest_instance_id| and sets initialization
+  // parameters, |params| for it.
+  void SetAttachParamsForGuest(int embedder_render_process_id,
+                               int embedder_routing_id,
+                               int element_instance_id,
+                               int guest_instance_id,
+                               const base::DictionaryValue& params);
+
   int GetNextInstanceID();
 
   typedef base::Callback<void(content::WebContents*)>
@@ -73,6 +82,9 @@ class GuestViewManager : public content::BrowserPluginGuestManager,
       const GuestByInstanceIDCallback& callback) OVERRIDE;
   virtual bool ForEachGuest(content::WebContents* embedder_web_contents,
                             const GuestCallback& callback) OVERRIDE;
+  virtual int GetGuestInstanceIDForPluginID(
+      content::WebContents* embedder_web_contents,
+      int element_instance_id) OVERRIDE;
 
  protected:
   friend class GuestViewBase;
@@ -106,6 +118,26 @@ class GuestViewManager : public content::BrowserPluginGuestManager,
   typedef std::map<int, content::WebContents*> GuestInstanceMap;
   GuestInstanceMap guest_web_contents_by_instance_id_;
 
+  struct ElementInstanceKey {
+    content::WebContents* embedder_web_contents;
+    int element_instance_id;
+    ElementInstanceKey(content::WebContents* embedder_web_contents,
+                       int element_instance_id)
+        : embedder_web_contents(embedder_web_contents),
+          element_instance_id(element_instance_id) {}
+    bool operator<(const ElementInstanceKey& other) const {
+      if (embedder_web_contents != other.embedder_web_contents)
+        return embedder_web_contents < other.embedder_web_contents;
+      return element_instance_id < other.element_instance_id;
+    }
+  };
+
+  typedef std::map<ElementInstanceKey, int> GuestInstanceIDMap;
+  GuestInstanceIDMap instance_id_map_;
+  // The reverse map of GuestInstanceIDMap.
+  typedef std::map<int, ElementInstanceKey> GuestInstanceIDReverseMap;
+  GuestInstanceIDReverseMap reverse_instance_id_map_;
+
   int current_instance_id_;
 
   // Any instance ID whose number not greater than this was removed via