GTK test_shell: don't send some mouse events to renderer.
GTK test_shell: don't send some mouse events to renderer.

test_shell crashses if we double/triple click or press buttons whose id is greater than 3. After this change, we ignore such mouse events just like chromium.

Corresponding changes:
http://codereview.chromium.org/155250
http://codereview.chromium.org/431031

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/435041

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@33435 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser