Update TouchEvent initialize for USE_XI2_MT according to http://codereview.chromium.org/7942004/ refactoring.
Update TouchEvent initialize for USE_XI2_MT according to
http://codereview.chromium.org/7942004/ refactoring.

BUG=
TEST=build with touchui=1 use_xi2_mt=1

Review URL: http://codereview.chromium.org/8060002

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@103116 0039d316-1c4b-4281-b951-d872f2087c98

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