fileSystemProvider: First cut at implementing fileSystemProvider API

chrome/renderer/extensions/file_system_provider_natives.cc

Index: chrome/renderer/extensions/file_system_provider_natives.cc
diff --git a/chrome/renderer/extensions/file_system_provider_natives.cc b/chrome/renderer/extensions/file_system_provider_natives.cc
new file mode 100644
index 0000000000000000000000000000000000000000..5a48c793a3bce23c8e8e823c483318897c3d337a
--- /dev/null
+++ b/chrome/renderer/extensions/file_system_provider_natives.cc
@@ -0,0 +1,53 @@
+// Copyright 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/renderer/extensions/file_system_provider_natives.h"
+
+#include <string>
+
+#include "third_party/WebKit/public/platform/WebString.h"
+#include "third_party/WebKit/public/web/WebDOMError.h"
+#include "v8/include/v8.h"
+
+namespace extensions {
+
+fileSystemProviderNatives::fileSystemProviderNatives(
+    ChromeV8Context* context)
+    : ObjectBackedNativeHandler(context) {
+  RouteFunction(
+      "GetDOMError",
+      base::Bind(&fileSystemProviderNatives::GetDOMError,
+                 base::Unretained(this)));
+}
+
+void fileSystemProviderNatives::GetDOMError(
+    const v8::FunctionCallbackInfo<v8::Value>& args) {
+  if (args.Length() != 2) {
+    NOTREACHED();
+    return;
+  }
+  if (!args[0]->IsString()) {
+    NOTREACHED();
+    return;
+  }
+  if (!args[1]->IsString()) {
+    NOTREACHED();
+    return;
+  }
+
+  std::string name(*v8::String::Utf8Value(args[0]));
+  if (name.empty()) {
+    NOTREACHED();
+    return;
+  }
+  std::string message(*v8::String::Utf8Value(args[1]));
+  // message is optional hence empty is fine.
+
+  WebKit::WebDOMError dom_error = WebKit::WebDOMError::create(
+      WebKit::WebString::fromUTF8(name),
+      WebKit::WebString::fromUTF8(message));
+  args.GetReturnValue().Set(dom_error.toV8Value());
+}
+
+}  // namespace extensions