在grepAndroid源码时进行divider_holo_light，获得如下结果：
~/platform_frameworks_base/core/res/res master gg divider_holo_light .
./values/arrays.xml:137: <item>@drawable/list_section_divider_holo_light</item>
./values/arrays.xml:239: <item>@drawable/list_divider_holo_light</item>
./values/arrays.xml:240: <item>@drawable/list_divider_holo_light</item>
./values/styles.xml:2031: <item name="android:background">@android:drawable/list_section_divider_holo_light</item>
./values/themes.xml:1298: <item name="listDivider">@drawable/list_divider_holo_light</item>
./values/themes.xml:1316: <item name="listDividerAlertDialog">@android:drawable/list_divider_holo_light</item>
在grepdivider的下拉目录时，得到：
~/platform_frameworks_base/core/res/res/drawable master ls | grep divider
action_bar_divider.xml
怎么知道list_divider_holo_light在哪定义的？
