Promotes common functions to WmRootWindowController

Promotes common functions to WmRootWindowController

Specifically ConfigureWidgetInitParamsForContainer(),
FindEventTarget() and GetLastMouseLocation() can be shared.

BUG=671246
TEST=none
R=msw@chromium.org

[sky, 2017-01-09 22:40:43]

The CQ bit was checked by sky@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-01-09 22:41:39]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[msw, 2017-01-09 23:26:49]

lgtm with a nit

https://codereview.chromium.org/2624613002/diff/1/ash/common/wm_root_window_c...
File ash/common/wm_root_window_controller.cc (right):

https://codereview.chromium.org/2624613002/diff/1/ash/common/wm_root_window_c...
ash/common/wm_root_window_controller.cc:247: gfx::Point
WmRootWindowController::GetLastMouseLocationInRoot() {
nit: match function decl order

[sky, 2017-01-09 23:37:25]

The CQ bit was checked by sky@chromium.org

[sky, 2017-01-09 23:37:25]

The patchset sent to the CQ was uploaded after l-g-t-m from msw@chromium.org
Link to the patchset: https://codereview.chromium.org/2624613002/#ps20001
(title: "order")

[commit-bot: I haz the power, 2017-01-09 23:39:03]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[sky, 2017-01-09 23:39:12]

https://codereview.chromium.org/2624613002/diff/1/ash/common/wm_root_window_c...
File ash/common/wm_root_window_controller.cc (right):

https://codereview.chromium.org/2624613002/diff/1/ash/common/wm_root_window_c...
ash/common/wm_root_window_controller.cc:247: gfx::Point
WmRootWindowController::GetLastMouseLocationInRoot() {
On 2017/01/09 23:26:48, msw wrote:
> nit: match function decl order

Done.

[commit-bot: I haz the power, 2017-01-10 01:01:31]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1484005045477380,
"parent_rev": "98eb95e743dd9a581aab0bc90953382f4e171741", "commit_rev":
"06af9c916f580de458f256ed0164e92d93350be1"}

[commit-bot: I haz the power, 2017-01-10 01:08:44]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-01-10 01:08:48]

Prior attempt to commit was detected, but we were not able to check whether the
issue was successfully committed. Please check Git history manually and re-check
CQ or close this issue as needed.

[sky, 2017-01-10 03:24:31]

On 2017/01/10 01:08:48, commit-bot: I haz the power wrote:
> Prior attempt to commit was detected, but we were not able to check whether
the
> issue was successfully committed. Please check Git history manually and
re-check
> CQ or close this issue as needed.

This landed @ 06af9c916f580de458f256ed0164e92d93350be1.