Introduces a new MHTML generation parameter specifying different behvaior for cache-control headers.

third_party/WebKit/public/web/WebFrameSerializerCacheControlPolicy.h

+// Copyright 2016 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 WebFrameSerializerCacheControlPolicy_h
+#define WebFrameSerializerCacheControlPolicy_h
+
+namespace blink {
+
+// WebFrameSerializerCacheControlPolicy configures how WebFrameSerializer
+// processes resources with different Cache-Control headers. By default, frame
+// serialization encompasses all resources in a page.  If it is desirable to
+// serialize only those resources that could be stored by a http cache, the
+// other options may be used.
+// TODO(dewittj): Add more policies for subframes and subresources.
+enum class WebFrameSerializerCacheControlPolicy {
+    None = 0,
+    FailForNoStoreMainFrame,
+    Last = FailForNoStoreMainFrame,
+};
+
+} // namespace blink
+
+#endif // WebFrameSerializerCacheControlPolicy_h