Unified icon-buttons used in the new GAIA flow.

chrome/app/theme/theme_resources.grd

Index: chrome/app/theme/theme_resources.grd
diff --git a/chrome/app/theme/theme_resources.grd b/chrome/app/theme/theme_resources.grd
index 3b6dfbc4884669cb199c1ef991c7e3f7b3a82600..a7b723d27aebb9d914c486b14b1b2a29b75aa697 100644
--- a/chrome/app/theme/theme_resources.grd
+++ b/chrome/app/theme/theme_resources.grd
@@ -444,11 +444,6 @@
       <if expr="chromeos">
         <!-- TODO(nkostylev): This resource needs to be removed when cros login code is moved to ash. -->
         <structure type="chrome_scaled_image" name="IDR_LAUNCHER_BACKGROUND" file="cros/launcher_background.png" />
-        <structure type="chrome_scaled_image" name="IDR_LOGIN_BACK_BUTTTON" file="cros/login_back_button.png" />
-        <structure type="chrome_scaled_image" name="IDR_LOGIN_BACK_BUTTTON_MASKED" file="cros/login_back_button_masked.png" />
-        <structure type="chrome_scaled_image" name="IDR_LOGIN_CLOSE_BUTTTON" file="cros/login_close_button.png" />
-        <structure type="chrome_scaled_image" name="IDR_LOGIN_CLOSE_BUTTTON_MASKED" file="cros/login_close_button_masked.png" />
-        <structure type="chrome_scaled_image" name="IDR_LOGIN_CLOSE_BUTTTON_ON_WHITE" file="cros/login_close_button_on_white.png" />
         <structure type="chrome_scaled_image" name="IDR_LOGIN_PASSWORD_CAPS_LOCK" file="cros/login_password_capslock.png" />
       </if>
       <if expr="chromeos">