Adding UMA on page load size for pages with Media

third_party/WebKit/public/platform/WebLoadingBehaviorFlag.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 WebLoadingBehaviorFlag_h
 #define WebLoadingBehaviorFlag_h
 
 namespace blink {
 
 // This enum tracks certain behavior Blink exhibits when loading a page. This is
@@ skipping 15 matching lines @@
   // document.written script.
   WebLoadingBehaviorDocumentWriteBlockReload = 1 << 3,
   // The page loaded external CSS that generated a PreloadRequest via the
   // CSSPreloaderResourceClient.
   WebLoadingBehaviorCSSPreloadFound = 1 << 4,
   // Indicates that the page has a synchronous, same-origin document.written
   // script with different protocol.
   WebLoadingBehaviorDocumentWriteBlockDifferentScheme = 1 << 5,
   // Indicates that a subresource on the page matched the subresource filtering
   // rules.
-  WebLoadingBehaviorSubresourceFilterMatch = 1 << 6
+  WebLoadingBehaviorSubresourceFilterMatch = 1 << 6,
+  // Indicates if a media element has been played.
+  WebLoadingBehaviorMediaPlayed = 1 << 7
 };
 
 }  // namespace blink
 
 #endif  // WebLoadingBehaviorFlag_h