PlzNavigate: Fix for the http/tests/inspector/resource-har-conversion.html layout test failure.

third_party/WebKit/public/web/WebDevToolsAgent.h

 /*
  * Copyright (C) 2009 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 44 matching lines @@
                                           int callId,
                                           const WebString& method,
                                           const WebString& message) = 0;
 
   virtual void inspectElementAt(int sessionId, const WebPoint&) = 0;
   virtual void failedToRequestDevTools() = 0;
 
   // Exposed for TestRunner.
   virtual WebString evaluateInWebInspectorOverlay(const WebString& script) = 0;
 
+  // Returns true if caching is disabled for network requests issued by dev
+  // tools.
+  virtual bool cacheDisabled() = 0;
+
   class MessageDescriptor {
    public:
     virtual ~MessageDescriptor() {}
     virtual WebDevToolsAgent* agent() = 0;
     virtual WebString message() = 0;
     virtual WebString method() = 0;
   };
   // Asynchronously request debugger to pause immediately and run the command.
   BLINK_EXPORT static void interruptAndDispatch(int sessionId,
                                                 MessageDescriptor*);
   BLINK_EXPORT static bool shouldInterruptForMethod(const WebString&);
 };
 
 }  // namespace blink
 
 #endif