Fix the misalignment on CrOS of the tab background images

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 e93f672141d4a83c4d05610d021bc8adbf5c5562..26cc6c2ff9fc55e9546c0318d0ae87229819ebc4 100644
--- a/chrome/app/theme/theme_resources.grd
+++ b/chrome/app/theme/theme_resources.grd
@@ -860,6 +860,9 @@
       <structure type="chrome_scaled_image" name="IDR_THEME_NTP_ATTRIBUTION" file="notused.png" />
       <structure type="chrome_scaled_image" name="IDR_THEME_NTP_BACKGROUND" file="common/ntp_background.png" />
       <structure type="chrome_scaled_image" name="IDR_THEME_NTP_BACKGROUND_WHITE" file="common/ntp_background_white.png" />
+      <structure type="chrome_scaled_image" name="IDR_THEME_TAB_BACKGROUND_OVERLAY" file="notused.png" />
+      <structure type="chrome_scaled_image" name="IDR_THEME_TAB_BACKGROUND_INCOGNITO_OVERLAY" file="notused.png" />
+      <structure type="chrome_scaled_image" name="IDR_THEME_TAB_BACKGROUND_V_OVERLAY" file="notused.png" />
       <if expr="not pp_ifdef('use_ash') and not is_macosx">
         <structure type="chrome_scaled_image" name="IDR_THEME_TAB_BACKGROUND" file="theme_tab_background.png" />
         <structure type="chrome_scaled_image" name="IDR_THEME_TAB_BACKGROUND_INCOGNITO" file="theme_tab_background_incognito.png" />