Remove "Alternate frame caption button style" command line flag

chrome/app/generated_resources.grd

Index: chrome/app/generated_resources.grd
diff --git a/chrome/app/generated_resources.grd b/chrome/app/generated_resources.grd
index c85a57aa723ab469b6c16c77d10a6c5cf495736e..b7dc7e572d59aff1770abc3b7d57d5fbfb33bb92 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -5977,12 +5977,6 @@ Keep your key file in a safe place. You will need it to create new versions of y
         Disable user gesture requirement for playing media elements. Activating this will allow autoplay to work.
       </message>
       <if expr="use_ash">
-        <message name="IDS_FLAGS_ASH_FRAME_CAPTION_BUTTON_STYLE_NAME" desc="Title for the flag for the alternate frame caption button style.">
-          Alternate frame caption button style
-        </message>
-        <message name="IDS_FLAGS_ASH_FRAME_CAPTION_BUTTON_STYLE_DESCRIPTION" desc="Description for the flag for the alternate frame caption button style.">
-          Enables an experimental visual style for the frame caption buttons (minimize, maximize, close).
-        </message>
         <message name="IDS_FLAGS_ASH_ENABLE_TOUCH_VIEW_TESTING_NAME" desc="Title for the flag which can be used to test the TouchView maximizing mode.">
           Enable TouchView maximizing UI for testing
         </message>