[DevTools] Show blocked requests in Network panel.

Source/platform/network/ResourceRequest.h

 /*
  * Copyright (C) 2003, 2006 Apple Computer, Inc.  All rights reserved.
  * Copyright (C) 2006 Samuel Weinig <sam.weinig@gmail.com>
  * Copyright (C) 2009, 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
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 namespace blink {
 
 enum ResourceRequestCachePolicy {
     UseProtocolCachePolicy, // normal load
     ReloadIgnoringCacheData, // reload
     ReturnCacheDataElseLoad, // back/forward or encoding change - allow stale data
     ReturnCacheDataDontLoad, // results of a post - allow stale data and only use cache
     ReloadBypassingCache, // end-to-end reload
 };
 
+enum ResourceRequestBlockedReason {
+    ResourceRequestBlockedReasonCSP,
+    ResourceRequestBlockedReasonMixedContent,
+    ResourceRequestBlockedReasonOrigin,
+    ResourceRequestBlockedReasonInspector,
+    ResourceRequestBlockedReasonOther,
+    ResourceRequestBlockedReasonNone
+};
+
 enum InputToLoadPerfMetricReportPolicy {
     NoReport, // Don't report metrics for this ResourceRequest.
     ReportLink, // Report metrics for this request as initiated by a link click.
     ReportIntent, // Report metrics for this request as initiated by an intent.
 };
 
 struct CrossThreadResourceRequestData;
 
 class PLATFORM_EXPORT ResourceRequest {
     WTF_MAKE_FAST_ALLOCATED(ResourceRequest);
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     bool m_checkForBrowserSideNavigation;
     double m_uiStartTime;
     bool m_originatesFromReservedIPRange;
     InputToLoadPerfMetricReportPolicy m_inputPerfMetricReportPolicy;
     bool m_followedRedirect;
 };
 
 } // namespace blink
 
 #endif // ResourceRequest_h