NaCl: Move sel_ldr_launcher_chrome.cc into the Chromium repo

ppapi/native_client/src/trusted/plugin/sel_ldr_launcher_chrome.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 "native_client/src/trusted/plugin/sel_ldr_launcher_chrome.h"
+
+#include "native_client/src/trusted/plugin/nacl_entry_points.h"
+
+#if NACL_WINDOWS
+# include <windows.h>
+#endif
+
+LaunchNaClProcessFunc launch_nacl_process = NULL;
+
+namespace plugin {
+
+bool SelLdrLauncherChrome::Start(const char* url) {
+  // send a synchronous message to the browser process
+  // TODO(mseaborn): Remove the nacl_proc_handle and nacl_proc_id
+  // arguments.  Chromium is being changed not to give the renderer
+  // the Windows handle of the NaCl process.
+  nacl::Handle nacl_proc_handle;
+  int nacl_proc_id;
+  // TODO(sehr): This is asserted to be one.  Remove this parameter.
+  static const int kNumberOfChannelsToBeCreated = 1;
+  if (!launch_nacl_process ||
+      !launch_nacl_process(url,
+                           kNumberOfChannelsToBeCreated,
+                           &channel_,
+                           &nacl_proc_handle,
+                           &nacl_proc_id)) {
+    return false;
+  }
+
+#if NACL_WINDOWS
+  if (nacl_proc_handle != nacl::kInvalidHandle &&
+      nacl_proc_handle != NULL) {
+    CloseHandle(nacl_proc_handle);
+  }
+#endif
+  return true;
+}
+
+}  // namespace plugin