Remove some theme images that are not used any more.

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 7ad26d300bea4d1df34d395efc10b2950f00afa3..ac73adba74aea34ae29e322a66f90774b3353480 100644
--- a/chrome/app/theme/theme_resources.grd
+++ b/chrome/app/theme/theme_resources.grd
@@ -558,30 +558,17 @@
         <structure type="chrome_scaled_image" name="IDR_TECHNICAL_ERROR" file="cros/technical_error.png" />
       </if>
       <structure type="chrome_scaled_image" name="IDR_THEME_BUTTON_BACKGROUND" file="notused.png" />
-      <if expr="not use_ash">
-        <structure type="chrome_scaled_image" name="IDR_THEME_FRAME" file="theme_frame.png" />
-        <structure type="chrome_scaled_image" name="IDR_THEME_FRAME_INACTIVE" file="theme_frame_inactive.png" />
-        <structure type="chrome_scaled_image" name="IDR_THEME_FRAME_INCOGNITO" file="theme_frame_incognito.png" />
-        <structure type="chrome_scaled_image" name="IDR_THEME_FRAME_INCOGNITO_INACTIVE" file="theme_frame_incognito_inactive.png" />
-      </if>
-      <if expr="use_ash">
-        <structure type="chrome_scaled_image" name="IDR_THEME_FRAME" file="notused.png" />
-        <structure type="chrome_scaled_image" name="IDR_THEME_FRAME_INACTIVE" file="notused.png" />
-        <structure type="chrome_scaled_image" name="IDR_THEME_FRAME_INCOGNITO" file="notused.png" />
-        <structure type="chrome_scaled_image" name="IDR_THEME_FRAME_INCOGNITO_INACTIVE" file="notused.png" />
-      </if>
+      <structure type="chrome_scaled_image" name="IDR_THEME_FRAME" file="notused.png" />
+      <structure type="chrome_scaled_image" name="IDR_THEME_FRAME_INACTIVE" file="notused.png" />
+      <structure type="chrome_scaled_image" name="IDR_THEME_FRAME_INCOGNITO" file="notused.png" />
+      <structure type="chrome_scaled_image" name="IDR_THEME_FRAME_INCOGNITO_INACTIVE" file="notused.png" />
       <structure type="chrome_scaled_image" name="IDR_THEME_FRAME_OVERLAY" file="notused.png" />
       <structure type="chrome_scaled_image" name="IDR_THEME_FRAME_OVERLAY_INACTIVE" file="notused.png" />
       <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" />
-      <if expr="not use_ash and not is_macosx and not is_ios">
-        <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" />
-      </if>
-      <if expr="use_ash">
-        <!-- Ash has gray tab backgrounds, Windows uses blue. -->
-        <structure type="chrome_scaled_image" name="IDR_THEME_TAB_BACKGROUND" file="common/ash/theme_default_inactive.png" />
-        <structure type="chrome_scaled_image" name="IDR_THEME_TAB_BACKGROUND_INCOGNITO" file="common/ash/theme_default_inactive.png" />
+      <structure type="chrome_scaled_image" name="IDR_THEME_NTP_BACKGROUND" file="notused.png" />
+      <if expr="not is_macosx and not is_ios">
+        <structure type="chrome_scaled_image" name="IDR_THEME_TAB_BACKGROUND" file="notused.png" />
+        <structure type="chrome_scaled_image" name="IDR_THEME_TAB_BACKGROUND_INCOGNITO" file="notused.png" />
       </if>
       <if expr="is_macosx or is_ios">
         <structure type="chrome_scaled_image" name="IDR_THEME_TAB_BACKGROUND" file="mac/theme_default_inactive.png" />
@@ -590,7 +577,7 @@
           <structure type="chrome_scaled_image" name="IDR_THEME_TAB_BACKGROUND_INCOGNITO" file="mac/theme_default_inactive.png" />
         </if>
       </if>
-      <structure type="chrome_scaled_image" name="IDR_THEME_TAB_BACKGROUND_V" file="theme_tab_background_glass.png" />
+      <structure type="chrome_scaled_image" name="IDR_THEME_TAB_BACKGROUND_V" file="notused.png" />
       <if expr="not is_macosx and not is_ios">
         <!-- This identifier exists to give us something to associate with a custom image that a theme can provide.
              In normal themes, it's unused. -->