Don't rely on implicit operator T* conversion for the LayerTree child.

Update a template to use LayerTreeHostCommon::get_child_as_raw_ptr(),
rather than relying on implicit conversion.

BUG=110610
R=enne

Review URL: https://chromiumcodereview.appspot.com/15848024

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@205048 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed