[Android] Disable fling cancel filtering in the GestureEventQueue

[Android] Disable fling cancel filtering in the GestureEventQueue

WebView has externally-managed flings that are invisible to the
GestureEventQueue. This led to cases where we were dropping
GestureFlingCancel events while a WebView-managed fling was still
active.

For now, disable GestureEventQueue filtering of GFC events on Android,
instead using the "scroll in progress" bits from ContentViewCore to
filter the events. When WebView's fling architecture is unified with
that of the rest of Chrome, we can remove this exception.

BUG=321141
Committed: https://crrev.com/f795840aee796fabc7267f9d33f159f5ace79cca
Cr-Commit-Position: refs/heads/master@{#323510}

[jdduke (slow), 2015-04-01 20:21:25]

jdduke@chromium.org changed reviewers:
+ boliu@chromium.org, tdresser@chromium.org

[jdduke (slow), 2015-04-01 20:21:26]

+tdresser for content/browser/renderer_host/input changes.
+boliu for content/browser/android and content/public/android changes.

[boliu, 2015-04-01 21:11:01]

On 2015/04/01 20:21:26, jdduke wrote:
> +tdresser for content/browser/renderer_host/input changes.
> +boliu for content/browser/android and content/public/android changes.

lgtm, and tested in webview

[jdduke (slow), 2015-04-02 15:43:25]

The CQ bit was checked by jdduke@chromium.org

[jdduke (slow), 2015-04-02 15:43:25]

The patchset sent to the CQ was uploaded after l-g-t-m from boliu@chromium.org
Link to the patchset: https://codereview.chromium.org/1053823002/#ps40001
(title: "Cleanup, working tests")

[commit-bot: I haz the power, 2015-04-02 15:44:55]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1053823002/40001

[commit-bot: I haz the power, 2015-04-02 16:41:22]

Committed patchset #3 (id:40001)

[jdduke (slow), 2015-04-02 16:46:15]

On 2015/04/02 16:41:22, I haz the power (commit-bot) wrote:
> Committed patchset #3 (id:40001)

Sorry for not waiting Tim, I didn't realize yesterday that you all were on
vacation until Tuesday (and this change definitely needs to make it into the M43
branch).

[commit-bot: I haz the power, 2015-04-03 20:26:30]

Patchset 3 (id:??) landed as
https://crrev.com/f795840aee796fabc7267f9d33f159f5ace79cca
Cr-Commit-Position: refs/heads/master@{#323510}

[tdresser, 2015-04-07 14:32:42]

On 2015/04/03 20:26:30, I haz the power (commit-bot) wrote:
> Patchset 3 (id:??) landed as
> https://crrev.com/f795840aee796fabc7267f9d33f159f5ace79cca
> Cr-Commit-Position: refs/heads/master@{#323510}

No worries.
Postlanding LGTM.