Context menus should appear above the touch point if invoked by long press.

content/public/common/context_menu_source_type.h

Index: content/public/common/context_menu_source_type.h
diff --git a/content/public/common/context_menu_source_type.h b/content/public/common/context_menu_source_type.h
new file mode 100644
index 0000000000000000000000000000000000000000..e1fc54bf588912d40a2977a0a46fece814f49335
--- /dev/null
+++ b/content/public/common/context_menu_source_type.h
@@ -0,0 +1,18 @@
+// 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.
+
+#ifndef CONTENT_PUBLIC_COMMON_CONTEXT_MENU_SOURCE_TYPE_H_
+#define CONTENT_PUBLIC_COMMON_CONTEXT_MENU_SOURCE_TYPE_H_
+
+namespace content {
+
+enum ContextMenuSourceType {
+  CONTEXT_MENU_SOURCE_MOUSE,
+  CONTEXT_MENU_SOURCE_KEYBOARD,
+  CONTEXT_MENU_SOURCE_TOUCH,
+};
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_COMMON_CONTEXT_MENU_SOURCE_TYPE_H_