Specify AllowCaching = false for some ChromeOS UI pages

chrome/browser/ui/webui/chromeos/slow_trace_ui.cc

 // Copyright 2013 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.
 
 #include "chrome/browser/ui/webui/chromeos/slow_trace_ui.h"
 
 #include <stddef.h>
 
 #include "base/bind.h"
 #include "base/memory/ref_counted_memory.h"
@@ skipping 44 matching lines @@
 }
 
 SlowTraceSource::~SlowTraceSource() {}
 
 void SlowTraceSource::OnGetTraceData(
     const content::URLDataSource::GotDataCallback& callback,
     scoped_refptr<base::RefCountedString> trace_data) {
   callback.Run(trace_data.get());
 }
 
+bool SlowTraceSource::AllowCaching() const {
+  // Should not be cached to reflect dynamically-generated contents that may
+  // depend on current settings.
+  return false;
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 //
 // SlowTraceController
 //
 ////////////////////////////////////////////////////////////////////////////////
 
 SlowTraceController::SlowTraceController(content::WebUI* web_ui)
     : WebUIController(web_ui) {
   SlowTraceSource* html_source = new SlowTraceSource();
 
   // Set up the chrome://slow_trace/ source.
   Profile* profile = Profile::FromWebUI(web_ui);
   content::URLDataSource::Add(profile, html_source);
 }
 
 } // namespace chromeos