Move ContentWindow from BrowserPlugin To GuestView

extensions/renderer/guest_view/guest_view_internal_custom_bindings.cc

 // 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.
 
 #include "extensions/renderer/guest_view/guest_view_internal_custom_bindings.h"
 
 #include <string>
 
 #include "base/bind.h"
-#include "content/public/renderer/render_frame.h"
 #include "content/public/renderer/render_view.h"
 #include "content/public/renderer/v8_value_converter.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/extension_messages.h"
+#include "extensions/renderer/guest_view/guest_view_container.h"
 #include "extensions/renderer/script_context.h"
 #include "v8/include/v8.h"
 
 using content::V8ValueConverter;
 
 namespace extensions {
 
 GuestViewInternalCustomBindings::GuestViewInternalCustomBindings(
     ScriptContext* context)
     : ObjectBackedNativeHandler(context) {
   RouteFunction("AttachGuest",
                 base::Bind(&GuestViewInternalCustomBindings::AttachGuest,
                            base::Unretained(this)));
 }
 
 void GuestViewInternalCustomBindings::AttachGuest(
     const v8::FunctionCallbackInfo<v8::Value>& args) {
-  CHECK(args.Length() == 3 && args[0]->IsInt32() && args[1]->IsInt32() &&
-      args[2]->IsObject());
+  // Allow for an optional callback parameter.
+  CHECK(args.Length() >= 3 && args.Length() <= 4);
+  // Element Instance ID.
+  CHECK(args[0]->IsInt32());
+  // Guest Instance ID.
+  CHECK(args[1]->IsInt32());
+  // Attach Parameters.
+  CHECK(args[2]->IsObject());
+  // Optional Callback Function.
+  CHECK(args.Length() < 4 || args[3]->IsFunction());
 
-  content::RenderFrame* render_frame = context()->GetRenderFrame();
-  if (!render_frame)
+  int element_instance_id = args[0]->Int32Value();
+  // An element instance ID uniquely identifies a GuestViewContainer within
+  // a RenderView.
+  GuestViewContainer* guest_view_container =
+      GuestViewContainer::FromID(context()->GetRenderView()->GetRoutingID(),
+                                 element_instance_id);
+
+  // TODO(fsamuel): Should we be reporting an error if the element instance ID
+  // is invalid?
+  if (!guest_view_container)
     return;
 
-  int element_instance_id = args[0]->Int32Value();
   int guest_instance_id = args[1]->Int32Value();
 
   scoped_ptr<base::DictionaryValue> params;
   {
     scoped_ptr<V8ValueConverter> converter(V8ValueConverter::create());
     scoped_ptr<base::Value> params_as_value(
         converter->FromV8Value(args[2], context()->v8_context()));
     CHECK(params_as_value->IsType(base::Value::TYPE_DICTIONARY));
     params.reset(
         static_cast<base::DictionaryValue*>(params_as_value.release()));
   }
 
-  // Step 1, send the attach params to chrome/.
-  render_frame->Send(new ExtensionHostMsg_AttachGuest(
-      render_frame->GetRenderView()->GetRoutingID(),
+  guest_view_container->AttachGuest(
       element_instance_id,
       guest_instance_id,
-      *params));
-
-  // Step 2, attach plugin through content/.
-  render_frame->AttachGuest(element_instance_id);
+      params.Pass(),
+      args.Length() == 4 ? args[3].As<v8::Function>() :
+          v8::Handle<v8::Function>(),
+      args.GetIsolate());
 
   args.GetReturnValue().Set(v8::Boolean::New(context()->isolate(), true));
 }
 
 }  // namespace extensions