Allow renderer to create pepper ResourceHosts in the browser

content/browser/renderer_host/pepper/pepper_renderer_connection.cc

+// Copyright (c) 2013 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/browser/renderer_host/pepper/pepper_renderer_connection.h"
+
+#include "content/browser/browser_child_process_host_impl.h"
+#include "content/browser/ppapi_plugin_process_host.h"
+#include "content/browser/renderer_host/pepper/browser_ppapi_host_impl.h"
+#include "content/public/browser/content_browser_client.h"
+#include "content/public/common/content_client.h"
+#include "ipc/ipc_message_macros.h"
+#include "ppapi/host/resource_host.h"
+#include "ppapi/proxy/ppapi_messages.h"
+#include "ppapi/proxy/resource_message_params.h"
+
+namespace content {
+
+PepperRendererConnection::PepperRendererConnection() {
+}
+
+PepperRendererConnection::~PepperRendererConnection() {
+}
+
+bool PepperRendererConnection::OnMessageReceived(const IPC::Message& msg,
+                                                 bool* message_was_ok) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP_EX(PepperRendererConnection, msg, *message_was_ok)
+    IPC_MESSAGE_HANDLER(PpapiHostMsg_CreateResourceHostFromHost,
+                        OnMsgCreateResourceHostFromHost)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP_EX()
+
+  return handled;
+}
+
+void PepperRendererConnection::OnMsgCreateResourceHostFromHost(
+    int child_process_id,
+    const ppapi::proxy::ResourceMessageCallParams& params,
+    PP_Instance instance,
+    const IPC::Message& nested_msg) {
+  BrowserPpapiHostImpl* host = NULL;
+
+  // Find the plugin which this message refers to. Check NaCl plugins first.
+  host = static_cast<BrowserPpapiHostImpl*>(
+      GetContentClient()->browser()->GetExternalBrowserPpapiHost(
+          child_process_id));
+
+  if (!host) {
+    // Check trusted pepper plugins.
+    for (PpapiPluginProcessHostIterator iter; !iter.Done(); ++iter) {
+      if (iter->process() &&
+          iter->process()->GetData().id == child_process_id) {
+        // Found the plugin.
+        host = iter->host_impl();
+        return;
+      }
+    }
+  }
+
+  int pending_resource_host_id;
+  if (!host) {
+    NOTREACHED();
+    pending_resource_host_id = 0;
+  } else {
+    scoped_ptr<ppapi::host::ResourceHost> resource_host =
+        host->GetPpapiHost()->CreateResourceHost(params,
+                                                 instance,
+                                                 nested_msg);
+    pending_resource_host_id =
+        host->GetPpapiHost()->AddPendingResourceHost(resource_host.Pass());
+  }
+
+  Send(new PpapiHostMsg_CreateResourceHostFromHostReply(
+      params.sequence(), pending_resource_host_id));
+}
+
+}  // namespace content