Land Anton's patch to avoid throwing away type information on the window wrapper in the debugger agent.
Land Anton's patch to avoid throwing away type information on the
window wrapper in the debugger agent.

Review URL: http://codereview.chromium.org/155179

TEST=none
BUG=none

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@20187 0039d316-1c4b-4281-b951-d872f2087c98

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