Specify AllowCaching = false for some ChromeOS UI pages

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

 // Copyright (c) 2012 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/mobile_setup_ui.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <map>
@@ skipping 140 matching lines @@
   // content::URLDataSource implementation.
   std::string GetSource() const override;
   void StartDataRequest(
       const std::string& path,
       const content::ResourceRequestInfo::WebContentsGetter& wc_getter,
       const content::URLDataSource::GotDataCallback& callback) override;
   std::string GetMimeType(const std::string&) const override {
     return "text/html";
   }
   bool ShouldAddContentSecurityPolicy() const override { return false; }
+  bool AllowCaching() const override {
+    // Should not be cached to reflect dynamically-generated contents that may
+    // depend on current settings.
+    return false;
+  }
 
  private:
   ~MobileSetupUIHTMLSource() override {}
 
   void GetPropertiesAndStartDataRequest(
       const content::URLDataSource::GotDataCallback& callback,
       const std::string& service_path,
       const base::DictionaryValue& properties);
   void GetPropertiesFailure(
       const content::URLDataSource::GotDataCallback& callback,
@@ skipping 467 matching lines @@
 
   if (navigation_handle->IsErrorPage()) {
     base::Value result_value(-navigation_handle->GetNetErrorCode());
     web_ui()->CallJavascriptFunctionUnsafe(kJsPortalFrameLoadFailedCallback,
                                            result_value);
     return;
   }
 
   web_ui()->CallJavascriptFunctionUnsafe(kJsPortalFrameLoadCompletedCallback);
 }