Add a button to exit managed mode.

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 4a2d3988977046556df97e25d0dbd984848a92a6..a091b4a766055ecaacf4297096ee47c0d32146ed 100644
--- a/chrome/app/theme/theme_resources.grd
+++ b/chrome/app/theme/theme_resources.grd
@@ -355,6 +355,12 @@
       <include name="IDR_CONTROLLED_SETTING_RECOMMENDED_GRAY" file="controlled_setting_recommended_gray.png" type="BINDATA" />
       <include name="IDR_CONTROLLED_SETTING_RECOMMENDED" file="controlled_setting_recommended.png" type="BINDATA" />
       <include name="IDR_CONTROLLED_SETTING_RECOMMENDED_LARGE" file="controlled_setting_recommended_large.png" type="BINDATA" />
+      <if expr="not is_macosx">
+        <include name="IDR_MANAGED_MODE_AVATAR" file="managed_mode_avatar.png" type="BINDATA" />
+      </if>
+      <if expr="is_macosx">
+        <include name="IDR_MANAGED_MODE_AVATAR" file="managed_mode_avatar_mac.png" type="BINDATA" />
+      </if>
       <if expr="pp_ifdef('_google_chrome')">
         <include name="IDR_WEBSTORE_ICON" file="google_chrome/webstore_icon.png" type="BINDATA" />
         <include name="IDR_WEBSTORE_ICON_16" file="google_chrome/webstore_icon_16.png" type="BINDATA" />