Browser Plugin: Add HTML5-like postMessage support

content/renderer/browser_plugin/browser_plugin.cc

 // 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.
 
 #include "content/renderer/browser_plugin/browser_plugin.h"
 
 #include "base/message_loop.h"
 #include "base/string_util.h"
 #if defined (OS_WIN)
 #include "base/sys_info.h"
@@ skipping 54 matching lines @@
     : instance_id_(instance_id),
       render_view_(render_view),
       container_(NULL),
       damage_buffer_(NULL),
       sad_guest_(NULL),
       guest_crashed_(false),
       resize_pending_(false),
       navigate_src_sent_(false),
       process_id_(-1),
       persist_storage_(false),
+      content_window_routing_id_(MSG_ROUTING_NONE),
       visible_(true),
       current_nav_entry_index_(0),
       nav_entry_count_(0) {
   BrowserPluginManager::Get()->AddBrowserPlugin(instance_id, this);
   bindings_.reset(new BrowserPluginBindings(this));
 
   ParseAttributes(params);
 }
 
 BrowserPlugin::~BrowserPlugin() {
@@ skipping 42 matching lines @@
           instance_id_,
           src,
           *params));
   // Record that we sent a NavigateGuest message to embedder.
   // Once this instance has navigated, the storage partition cannot be changed,
   // so this value is used for enforcing this.
   navigate_src_sent_ = true;
   src_ = src;
 }
 
+NPObject* BrowserPlugin::GetContentWindow() const {
+  if (content_window_routing_id_ == MSG_ROUTING_NONE)
+    return NULL;
+  RenderViewImpl* guest_render_view = static_cast<RenderViewImpl*>(
+      ChildThread::current()->ResolveRoute(content_window_routing_id_));
+  if (!guest_render_view)
+    return NULL;
+  WebKit::WebFrame* guest_frame = guest_render_view->GetWebView()->mainFrame();
+  return guest_frame->windowObject();
+}
+
 std::string BrowserPlugin::GetPartitionAttribute() const {
   std::string value;
   if (persist_storage_)
     value.append(kPersistPrefix);
 
   value.append(storage_partition_id_);
   return value;
 }
 
 bool BrowserPlugin::CanGoBack() const {
@@ skipping 332 matching lines @@
       frame->callFunctionEvenIfScriptDisabled(*it, v8::Object::New(), 1, &val);
   }
 }
 
 void BrowserPlugin::AdvanceFocus(bool reverse) {
   // We do not have a RenderView when we are testing.
   if (render_view_)
     render_view_->GetWebView()->advanceFocus(reverse);
 }
 
+void BrowserPlugin::GuestContentWindowReady(int content_window_routing_id) {
+  DCHECK(content_window_routing_id != MSG_ROUTING_NONE);
+  content_window_routing_id_ = content_window_routing_id;
+}
+
 void BrowserPlugin::SetAcceptTouchEvents(bool accept) {
   if (container())
     container()->setIsAcceptingTouchEvents(accept);
 }
 
 bool BrowserPlugin::HasListeners(const std::string& event_name) {
   return event_listener_map_.find(event_name) != event_listener_map_.end();
 }
 
 bool BrowserPlugin::AddEventListener(const std::string& event_name,
@@ skipping 290 matching lines @@
                                                  void* notify_data) {
 }
 
 void BrowserPlugin::didFailLoadingFrameRequest(
     const WebKit::WebURL& url,
     void* notify_data,
     const WebKit::WebURLError& error) {
 }
 
 }  // namespace content