gestures: Don't expose C++11 types if building under C++03

This removes the definition of GestureInterpreter from clients who build
with C++03. They must use the C interface of GestureInterpreter.

TEST=unit tests
BUG=chromium:351168

Change-Id: I0e7b3f2eda40c61a6db77d8597e6b871f35b71aa
Reviewed-on: https://chromium-review.googlesource.com/194963
Reviewed-by: Andrew de los Reyes <adlr@chromium.org>
Tested-by: Michael Spang <spang@chromium.org>
Commit-Queue: Michael Spang <spang@chromium.org>
1 file changed