Add navigator.doNotTrack property

content/renderer/do_not_track_bindings.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 "content/renderer/do_not_track_bindings.h"
+
+#include "content/renderer/render_view_impl.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
+#include "v8/include/v8.h"
+
+using WebKit::WebFrame;
+
+namespace {
+
+v8::Handle<v8::Value> GetDoNotTrack(v8::Local<v8::String> property,
+                                    const v8::AccessorInfo& info) {
+  WebFrame* frame = WebFrame::frameForCurrentContext();
+  if (!frame)
+    return v8::Null();
+  RenderViewImpl* view = RenderViewImpl::FromWebView(frame->view());
+  if (!view)
+    return v8::Null();
+  if (view->enable_do_not_track())
+    return v8::String::New("1");
+  return v8::Null();
+}
+
+}  // namespace
+
+namespace content {
+
+void InjectDoNotTrackBindings(WebFrame* frame) {
+  v8::HandleScope handle_scope;
+
+  v8::Handle<v8::Context> v8_context = frame->mainWorldScriptContext();
+  if (v8_context.IsEmpty())
+    return;
+
+  v8::Context::Scope scope(v8_context);
+
+  v8::Handle<v8::Object> global = v8_context->Global();
+  v8::Handle<v8::Object> navigator =
+      global->Get(v8::String::New("navigator"))->ToObject();
+  if (navigator.IsEmpty())
+    return;
+  navigator->SetAccessor(v8::String::New("doNotTrack"), GetDoNotTrack);
+}
+
+}  // namespace content