[meta-freescale] Failed to build chromium

[kongling]

Hi, everyone    I'm trying to build chromium with imx-3.10.31-1.1.0_beta but got a error.
bitbake chromiumLoading cache: 100% |###########################################| ETA:  00:00:00Loaded 2161 entries from dependency cache.NOTE: Resolving any missing task queue dependenciesERROR: Nothing PROVIDES 'libav' (but /home/user/imx-3.10.31-1.1.0_beta/sources/meta-browser/recipes-browser/chromium/chromium_35.0.1916.114.bb DEPENDS on or otherwise requires it)ERROR: libav was skipped: because it has a restricted license not whitelisted in LICENSE_FLAGS_WHITELISTERROR: libav was skipped: because it has a restricted license not whitelisted in LICENSE_FLAGS_WHITELISTERROR: Required build target 'chromium' has no buildable providers.Missing or unbuildable dependency chain was: ['chromium', 'libav']
   Could anyone help me?
BR,kongling 		 	   		  
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