Update V8 to revision 3.0.6.1.
Update V8 to revision 3.0.6.1.

This revision patches V8 to fix a potential crash in the compiler.

BUG=67732
TEST=fast/canvas/shadow-offset*

Review URL: http://codereview.chromium.org/5964015

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@70606 0039d316-1c4b-4281-b951-d872f2087c98

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