Disable drag and drop to virtual keyboard window
Disable drag and drop to virtual keyboard window

BUG=475076
TBR=sadrul

Review URL: https://codereview.chromium.org/1081913002

Cr-Commit-Position: refs/heads/master@{#325083}
(cherry picked from commit ed86e676e9015500abf6f3b48ccb4960db58b7e4)

Review URL: https://codereview.chromium.org/1087303002

Cr-Commit-Position: fe94940391158563b8e4cf7888f93321f554af93@{#99}
Cr-Branched-From: 9fdd9ec11ee753dedeffe15e7e822b13445dc287@{#323860}

fujunwei/chromium-crosswalk,fujunwei/chromium-crosswalk,fujunwei/chromium-crosswalk,fujunwei/chromium-crosswalk,fujunwei/chromium-crosswalk,fujunwei/chromium-crosswalk,fujunwei/chromium-crosswalk,fujunwei/chromium-crosswalk,fujunwei/chromium-crosswalk