Implement Origin cookies.

net/base/cookie_options.h

Index: net/base/cookie_options.h
===================================================================
--- net/base/cookie_options.h	(revision 65294)
+++ net/base/cookie_options.h	(working copy)
@@ -12,12 +12,13 @@
 
 class CookieOptions {
  public:
-  // Default is to exclude httponly, which means:
-  // - reading operations will not return httponly cookies.
+  // Default is for
+  // - reading operations will not return httponly or origin cookies.
   // - writing operations will not write httponly cookies.
   CookieOptions()
       : exclude_httponly_(true),
-        force_session_(false) {
+        force_session_(false),
+        read_origin_(false) {
   }
 
   void set_exclude_httponly() { exclude_httponly_ = true; }
@@ -28,9 +29,14 @@
   void set_force_session() { force_session_ = true; }
   bool force_session() const { return force_session_; }
 
+  void set_read_origin(bool flag) { read_origin_ = flag; }
+  bool read_origin() const { return read_origin_; }
+
  private:
+  // TODO(abarth): These member variable names should be nouns and not verbs.
   bool exclude_httponly_;
   bool force_session_;
+  bool read_origin_;
 };
 }  // namespace net