Specify AllowCaching = false for dynamically-generated contents

chrome/browser/ui/webui/extensions/extension_icon_source.cc

Index: chrome/browser/ui/webui/extensions/extension_icon_source.cc
diff --git a/chrome/browser/ui/webui/extensions/extension_icon_source.cc b/chrome/browser/ui/webui/extensions/extension_icon_source.cc
index dca1ae7bd3689a3ecd0b517ac54a18c145198faf..46f69c56a2385f19f9b8432ff5b8a6d3683ce1de 100644
--- a/chrome/browser/ui/webui/extensions/extension_icon_source.cc
+++ b/chrome/browser/ui/webui/extensions/extension_icon_source.cc
@@ -138,6 +138,12 @@ void ExtensionIconSource::StartDataRequest(
   }
 }
 
+bool ExtensionIconSource::AllowCaching() const {
+  // Should not be cached to reflect the latest contents that may be updated by
+  // Extensions.
+  return false;
+}
+
 ExtensionIconSource::~ExtensionIconSource() {
 }