1 files changed, 56 insertions, 0 deletions
diff --git a/chrome/renderer/extensions/file_system_natives.cc b/chrome/renderer/extensions/file_system_natives.cc
new file mode 100644
index 0000000..7ed653f
--- /dev/null
+++ b/chrome/renderer/extensions/file_system_natives.cc
@@ -0,0 +1,56 @@
+// 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/renderer/extensions/file_system_natives.h"
+
+#include <string>
+
+#include "base/basictypes.h"
+#include "base/logging.h"
+#include "chrome/common/url_constants.h"
+#include "chrome/renderer/extensions/user_script_slave.h"
+#include "grit/renderer_resources.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebFileSystem.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebString.h"
+#include "webkit/fileapi/file_system_types.h"
+#include "webkit/fileapi/file_system_util.h"
+
+namespace {
+
+static v8::Handle<v8::Value> GetIsolatedFileSystem(
+    const v8::Arguments& args) {
+  DCHECK(args.Length() == 1);
+  DCHECK(args[0]->IsString());
+  std::string file_system_id(*v8::String::Utf8Value(args[0]));
+  WebKit::WebFrame* webframe = WebKit::WebFrame::frameForCurrentContext();
+  DCHECK(webframe);
+
+  GURL context_url = UserScriptSlave::GetDataSourceURLForFrame(webframe);
+  CHECK(context_url.SchemeIs(chrome::kExtensionScheme));
+
+  std::string name(fileapi::GetIsolatedFileSystemName(context_url.GetOrigin(),
+                                                      file_system_id));
+
+  std::string root(fileapi::GetFileSystemRootURI(context_url.GetOrigin(),
+      fileapi::kFileSystemTypeIsolated).spec());
+  root.append(file_system_id);
+  root.append("/");
+
+  return webframe->createFileSystem(
+      WebKit::WebFileSystem::TypeIsolated,
+      WebKit::WebString::fromUTF8(name.c_str()),
+      WebKit::WebString::fromUTF8(root.c_str()));
+}
+
+}  // namespace
+
+namespace extensions {
+
+FileSystemNatives::FileSystemNatives()
+    : ChromeV8Extension(NULL) {
+  RouteStaticFunction("GetIsolatedFileSystem", &GetIsolatedFileSystem);
+}
+
+}  // namespace extensions