Implement chrome.downloads.onDeterminingFilename()

chrome/browser/extensions/api/downloads_internal/downloads_internal_api.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 "chrome/browser/extensions/api/downloads_internal/downloads_internal_api.h"
+
+#include "chrome/browser/extensions/api/downloads/downloads_api.h"
+#include "chrome/common/extensions/api/downloads_internal.h"
+
+DownloadsInternalDetermineFilenameFunction::
+    DownloadsInternalDetermineFilenameFunction() {}
+
+DownloadsInternalDetermineFilenameFunction::
+    ~DownloadsInternalDetermineFilenameFunction() {}
+
+typedef extensions::api::downloads_internal::DetermineFilename::Params
+    DetermineFilenameParams;
+
+bool DownloadsInternalDetermineFilenameFunction::RunImpl() {
+  scoped_ptr<DetermineFilenameParams> params(
+      DetermineFilenameParams::Create(*args_));
+  EXTENSION_FUNCTION_VALIDATE(params.get());
+  base::FilePath::StringType filename;
+  if (params->filename.get()) {
+    EXTENSION_FUNCTION_VALIDATE(args_->GetString(1, &filename));
+  }
+  return ExtensionDownloadsEventRouter::DetermineFilename(
+      profile(),
+      include_incognito(),
+      GetExtension()->id(),
+      params->download_id,
+      base::FilePath(filename),
+      params->overwrite && *params->overwrite,
+      &error_);
+}