Cherry-pick "[Android] Don't hide text handles if they are being dragged"

From https://codereview.chromium.org/26491010/

Bug 10723151

Original Description:

In webview, hiding of text handles can be triggered by many events
(containing view being scrolled, capturePicture call, etc.). If the
user is dragging a handle, we don't actually want to hide it. Instead,
explicitly suppress hiding of text handles while they are being dragged.

BUG=b/10723151

Review URL: https://codereview.chromium.org/26491010

Change-Id: I254e12582c0ef3446756c2aa1d8b418639413f3c
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@228728 0039d316-1c4b-4281-b951-d872f2087c98
2 files changed