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),
+      guest_routing_id_(MSG_ROUTING_NONE),
       visible_(true) {
   BrowserPluginManager::Get()->AddBrowserPlugin(instance_id, this);
   bindings_.reset(new BrowserPluginBindings(this));
 
   ParseAttributes(params);
 }
 
 BrowserPlugin::~BrowserPlugin() {
   if (damage_buffer_)
     FreeDamageBuffer();
@@ skipping 48 matching lines @@
     // guest's |src| to empty value, resize and then set the |src| to a
     // non-empty value).
     // Additionally, 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;
   guest_crashed_ = false;
 }
 
+NPObject* BrowserPlugin::GetContentWindow() const {
+  if (guest_routing_id_ == MSG_ROUTING_NONE)
+    return NULL;
+  RenderViewImpl* guest_render_view = static_cast<RenderViewImpl*>(
+    ChildThread::current()->ResolveRoute(guest_routing_id_));

[Charlie Reis, 2012/10/12 00:31:43]

nit: wrong indent.

[Fady Samuel, 2012/10/12 18:07:53]

Done.

+  if (!guest_render_view)
+    return NULL;
+  WebKit::WebFrame* guest_frame = guest_render_view->GetWebView()->mainFrame();
+  return guest_frame->windowObject();

[Charlie Reis, 2012/10/12 00:31:43]

This is beyond my knowledge.  Is it safe to return a NPObject*?  Do we need to
document the dangers of it?  (I'm hoping to avoid similar issues like we saw
with the v8 event stuff.)

[Fady Samuel, 2012/10/12 18:07:53]

I will ask abarth@ to at a look at BrowserPlugin::GetContentWindow. Thanks.

+}
+
 std::string BrowserPlugin::GetPartitionAttribute() const {
   std::string value;
   if (persist_storage_)
     value.append(kPersistPrefix);
 
   value.append(storage_partition_id_);
   return value;
 }
 
 bool BrowserPlugin::SetPartitionAttribute(const std::string& partition_id,
@@ skipping 309 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 guest_routing_id) {
+  DCHECK(guest_routing_id != MSG_ROUTING_NONE);
+  guest_routing_id_ = guest_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 268 matching lines @@
                                                  void* notify_data) {
 }
 
 void BrowserPlugin::didFailLoadingFrameRequest(
     const WebKit::WebURL& url,
     void* notify_data,
     const WebKit::WebURLError& error) {
 }
 
 }  // namespace content