Adding close button in SigninPromoView

ios/chrome/browser/ui/authentication/BUILD.gn

Index: ios/chrome/browser/ui/authentication/BUILD.gn
diff --git a/ios/chrome/browser/ui/authentication/BUILD.gn b/ios/chrome/browser/ui/authentication/BUILD.gn
index 4006c8dd5beded8bbbb6ce9ea996515ad0549491..d11a5f66fc32fe0c9215b55b7565d737a8af6f09 100644
--- a/ios/chrome/browser/ui/authentication/BUILD.gn
+++ b/ios/chrome/browser/ui/authentication/BUILD.gn
@@ -9,6 +9,9 @@ bundle_data("resources") {
     "resources/signin_confirmation_more.png",
     "resources/signin_confirmation_more@2x.png",
     "resources/signin_confirmation_more@3x.png",
+    "resources/signin_promo_dismiss_gray.png",

[msarda, 2017/04/28 16:08:16]

This is a general comment that applies to all your CL:
I prefer "close" to "dismiss" for the name of this button. That would mean
changing "dismiss" to "close" in all your CL, so it would be a good idea to get
a second opinion (ideally from a native english speaker) before making this
change.

[lpromero, 2017/05/02 16:46:04]

I agree it would fit better with the naming we already have in the app.

[jlebel, 2017/05/03 12:41:14]

Done.

+    "resources/signin_promo_dismiss_gray@2x.png",
+    "resources/signin_promo_dismiss_gray@3x.png",
   ]
   if (is_chrome_branded) {
     sources += [