am 5243b109: WebKit clean required by move of V8 to external/v8.

Merge commit '5243b109acec2b03431aef36ccc42256b77ae316' into eclair-mr2-plus-aosp

* commit '5243b109acec2b03431aef36ccc42256b77ae316':
  WebKit clean required by move of V8 to external/v8.