Don't save or load cookies for non-cookieable scheme requests.

This fixes an IsCanonical() DCHECK failure triggered by calling
CanonicalCookie::Create for a non-cookieable URL.

This change also adds unit test coverage for cross-origin cookie
behavior with sub-resource requests (iframe, XHR, Fetch).

tests/ceftests/test_request.h

@@ -9,6 +9,7 @@
 #include <string>
 
 #include "include/base/cef_bind.h"
+#include "include/cef_cookie.h"
 #include "include/cef_frame.h"
 #include "include/cef_request.h"
 #include "include/cef_request_context.h"
@@ -73,6 +74,23 @@ CefRefPtr<CefResourceHandler> CreateResourceHandler(
     CefRefPtr<CefResponse> response,
     const std::string& response_data);
 
+typedef std::vector<CefCookie> CookieVector;
+typedef base::Callback<void(const CookieVector& cookies)> CookieDoneCallback;
+
+// Retrieves all cookies from |manager| and executes |callback| upon completion.
+// If |deleteCookies| is true the cookies will also be deleted.
+void GetAllCookies(CefRefPtr<CefCookieManager> manager,
+                   bool deleteCookies,
+                   const CookieDoneCallback& callback);
+
+// Retrieves URL cookies from |manager| and executes |callback| upon completion.
+// If |deleteCookies| is true the cookies will also be deleted.
+void GetUrlCookies(CefRefPtr<CefCookieManager> manager,
+                   const CefString& url,
+                   bool includeHttpOnly,
+                   bool deleteCookies,
+                   const CookieDoneCallback& callback);
+
 }  // namespace test_request
 
 #endif  // CEF_TESTS_CEFTESTS_TEST_REQUEST_H_