Separate NaCl messages from the rest of chrome messages and create a new message filter. This is pa…

chrome/browser/nacl_host/nacl_host_message_filter.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 "chrome/browser/nacl_host/nacl_host_message_filter.h"
+
+#include "base/bind.h"
+#include "base/command_line.h"
+#include "base/file_util.h"
+#include "base/metrics/histogram.h"
+#include "chrome/browser/extensions/extension_info_map.h"
+#include "chrome/browser/extensions/extension_system.h"
+#include "chrome/browser/nacl_host/nacl_file_host.h"
+#include "chrome/browser/nacl_host/nacl_infobar.h"
+#include "chrome/browser/nacl_host/nacl_process_host.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/common/extensions/extension.h"
+#include "chrome/common/nacl_host_messages.h"
+#include "googleurl/src/gurl.h"
+#include "net/url_request/url_request_context.h"
+#include "net/url_request/url_request_context_getter.h"
+
+NaClHostMessageFilter::NaClHostMessageFilter(
+    int render_process_id,
+    Profile* profile,
+    net::URLRequestContextGetter* request_context)
+    : render_process_id_(render_process_id),
+      profile_(profile),
+      off_the_record_(profile_->IsOffTheRecord()),
+      request_context_(request_context),
+      extension_info_map_(
+          extensions::ExtensionSystem::Get(profile)->info_map()),
+      weak_ptr_factory_(this) {
+}
+
+NaClHostMessageFilter::~NaClHostMessageFilter() {
+}
+
+bool NaClHostMessageFilter::OnMessageReceived(const IPC::Message& message,
+                                              bool* message_was_ok) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP_EX(NaClHostMessageFilter, message, *message_was_ok)
+#if !defined(DISABLE_NACL)
+    IPC_MESSAGE_HANDLER_DELAY_REPLY(NaClHostMsg_LaunchNaCl, OnLaunchNaCl)
+    IPC_MESSAGE_HANDLER_DELAY_REPLY(NaClHostMsg_GetReadonlyPnaclFD,
+                                    OnGetReadonlyPnaclFd)
+    IPC_MESSAGE_HANDLER_DELAY_REPLY(NaClHostMsg_NaClCreateTemporaryFile,
+                                    OnNaClCreateTemporaryFile)
+    IPC_MESSAGE_HANDLER(NaClHostMsg_NaClErrorStatus, OnNaClErrorStatus)
+    IPC_MESSAGE_HANDLER_DELAY_REPLY(NaClHostMsg_OpenNaClExecutable,
+                                    OnOpenNaClExecutable)
+#endif
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+
+  return handled;
+}
+
+net::HostResolver* NaClHostMessageFilter::GetHostResolver() {
+  return request_context_->GetURLRequestContext()->host_resolver();
+}
+
+#if !defined(DISABLE_NACL)
+void NaClHostMessageFilter::OnLaunchNaCl(
+    const nacl::NaClLaunchParams& launch_params,
+    IPC::Message* reply_msg) {
+  NaClProcessHost* host = new NaClProcessHost(
+      GURL(launch_params.manifest_url),
+      launch_params.render_view_id,
+      launch_params.permission_bits,
+      launch_params.uses_irt,
+      launch_params.enable_dyncode_syscalls,
+      launch_params.enable_exception_handling,
+      off_the_record_,
+      profile_->GetPath());
+  host->Launch(this, reply_msg, extension_info_map_);
+}
+
+void NaClHostMessageFilter::OnGetReadonlyPnaclFd(
+    const std::string& filename, IPC::Message* reply_msg) {
+  // This posts a task to another thread, but the renderer will
+  // block until the reply is sent.
+  nacl_file_host::GetReadonlyPnaclFd(this, filename, reply_msg);
+}
+
+void NaClHostMessageFilter::OnNaClCreateTemporaryFile(
+    IPC::Message* reply_msg) {
+  nacl_file_host::CreateTemporaryFile(this, reply_msg);
+}
+
+void NaClHostMessageFilter::OnNaClErrorStatus(int render_view_id,
+                                              int error_id) {
+  // Currently there is only one kind of error status, for which
+  // we want to show the user an infobar.
+  ShowNaClInfobar(render_process_id_, render_view_id, error_id);
+}
+
+void NaClHostMessageFilter::OnOpenNaClExecutable(int render_view_id,
+                                                 const GURL& file_url,
+                                                 IPC::Message* reply_msg) {
+  nacl_file_host::OpenNaClExecutable(this, extension_info_map_,
+                                     render_view_id, file_url, reply_msg);
+}
+#endif