Specify AllowCaching = false for some ChromeOS UI pages

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

Index: chrome/browser/ui/webui/chromeos/mobile_setup_ui.cc
diff --git a/chrome/browser/ui/webui/chromeos/mobile_setup_ui.cc b/chrome/browser/ui/webui/chromeos/mobile_setup_ui.cc
index 1bff6a9351b59ca5ce9661c8a559176f5e97363d..26089fd707d4726d2cc1e9812d3d404b3f8d31e7 100644
--- a/chrome/browser/ui/webui/chromeos/mobile_setup_ui.cc
+++ b/chrome/browser/ui/webui/chromeos/mobile_setup_ui.cc
@@ -158,6 +158,11 @@ class MobileSetupUIHTMLSource : public content::URLDataSource {
     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 {}