<webview>: Make contentWindow available prior to attachment (on display:none).

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/child/v8_value_converter.h"
 #include "content/public/renderer/render_view.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/extension_messages.h"
 #include "extensions/renderer/guest_view/extensions_guest_view_container.h"
 #include "extensions/renderer/script_context.h"
+#include "third_party/WebKit/public/web/WebFrame.h"
+#include "third_party/WebKit/public/web/WebView.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)));
   RouteFunction("DetachGuest",
                 base::Bind(&GuestViewInternalCustomBindings::DetachGuest,
                            base::Unretained(this)));
+  RouteFunction("GetContentWindow",
+                base::Bind(&GuestViewInternalCustomBindings::GetContentWindow,
+                           base::Unretained(this)));
   RouteFunction(
       "RegisterDestructionCallback",
       base::Bind(&GuestViewInternalCustomBindings::RegisterDestructionCallback,
                  base::Unretained(this)));
   RouteFunction(
       "RegisterElementResizeCallback",
       base::Bind(
           &GuestViewInternalCustomBindings::RegisterElementResizeCallback,
           base::Unretained(this)));
 }
@@ skipping 69 matching lines @@
       new ExtensionsGuestViewContainer::DetachRequest(
           guest_view_container,
           args.Length() == 2 ? args[1].As<v8::Function>() :
               v8::Handle<v8::Function>(),
           args.GetIsolate()));
   guest_view_container->IssueRequest(request);
 
   args.GetReturnValue().Set(v8::Boolean::New(context()->isolate(), true));
 }
 
+void GuestViewInternalCustomBindings::GetContentWindow(
+    const v8::FunctionCallbackInfo<v8::Value>& args) {
+  // Default to returning null.
+  args.GetReturnValue().SetNull();
+
+  if (args.Length() != 1)
+    return;
+
+  // The routing ID for the RenderView.
+  if (!args[0]->IsInt32())
+    return;
+
+  int view_id = args[0]->Int32Value();
+  if (view_id == MSG_ROUTING_NONE)
+    return;
+
+  content::RenderView* view = content::RenderView::FromRoutingID(view_id);
+  if (!view)
+    return;
+
+  blink::WebFrame* frame = view->GetWebView()->mainFrame();
+  v8::Local<v8::Value> window = frame->mainWorldScriptContext()->Global();
+  args.GetReturnValue().Set(window);
+}
+
 void GuestViewInternalCustomBindings::RegisterDestructionCallback(
     const v8::FunctionCallbackInfo<v8::Value>& args) {
   // There are two parameters.
   CHECK(args.Length() == 2);
   // Element Instance ID.
   CHECK(args[0]->IsInt32());
   // Callback function.
   CHECK(args[1]->IsFunction());
 
   int element_instance_id = args[0]->Int32Value();
@@ skipping 27 matching lines @@
   if (!guest_view_container)
     return;
 
   guest_view_container->RegisterElementResizeCallback(
       args[1].As<v8::Function>(), args.GetIsolate());
 
   args.GetReturnValue().Set(v8::Boolean::New(context()->isolate(), true));
 }
 
 }  // namespace extensions